Persistence should be near impossible; you most likely have a bad habit or other factor that makes you vulnerable. As others have said, check your router settings; make sure your router firmware is the latest to patch any vulnerabilities. Check devices on your network to make sure none are compromised.
My first guess, like others, is you're doing something horribly wrong with your port forwarding, followed by you're installing suspect software. Don't go installing from random Github/Gitlab repositories without at least doing a bit of background research. Also, sometimes even legitimate open source projects get compromised. Ultimately, try to stick to the bare minimum, just stuff from the Debian repos, and see if it still happens.
If you still have the problem, then my last resort is to ask this (and this is really paranoid, hopefully an unlikely scenario for you): do you use your computer in a safe environment where only people you trust can access it?
I mostly ask because if not, maybe someone has physical access to your computer and is pulling an evil maid attack, installing the software when you're not looking. Maybe it's a jerk coworker. Maybe it's a creepy landlord. A login password is not enough to defend against this; it may be possible for the attacker to boot off a USB stick and modify system files. The only way to prevent this is to reinstall and use full disk encryption, which I do on my laptop. You can try to use Secure Boot and TPM1 to add further protection, but honestly, your attacker just sounds like some script kiddie and probably won't perform a complex attack on your boot partiton.
1: Despite their obnoxious utilization by Microsoft, they can actually be quite useful to a Linux user, making it possible to set up auto-decryption on boot that doesn't work if the boot partition has been tampered with (in which case you use a backup password).
I press X, and they make up some BS about how your unorthodox solution changes the warp geometry in just the right way. Picard gives you some sort of rant about being more careful in the future, a neutral relationship impact. Meanwhile, Chief tactical Lieutenant Murder-Anything-That-Isn't Human is so impressed their bio now says they want to marry you, though you know that will quickly change to shove you out an airlock unless you are a total psychopath.
I’m also really annoyed that the choice tree required a website that no longer works. Additionally, for the overall results of the graphics, I’m rather bugged the game is that hardware intensive and think they could have easily optimized to make this game more accessible to lower-end hardware. I did my entire playthrough on an AMD laptop with iGPU (on Linux through Proton), and it was mostly playable.
However, it was still really fun, and I only payed $12.50 for it.
Honestly, ENT looks pretty good. I mean, not as good as TOS remaster, but being done natively in 720p (and even 1080 in later seasons), it doesn't look that bad.
Honestly, GIMP feels like it's been getting rapidly more livable as a photo editor recently.
Like, I still wouldn't call it suitable for professional use, but it's been causing me noticeably less pain since they finally introduced some non-destructive editing.
Surely that's got to be in the replicator database; I mean, I think it would be a big mess up on the part of the Obsidian Order if Seska didn't at minimum have an opinion on jumja sticks, if not eat them frequently enough to get it programmed into the replicator.
I'm tired of multiverse plots, but I might make an exception if it allows them to bring Hemmer back without too severely messing up the overall plot of the show.
I think you’re mixing up Office 365 and Office Online.
Office 365 is a subscription for Microsoft Office that includes access to both the full, more powerful desktop Office applications and the much less powerful Office Online.
Though I don’t think it’s even called Office 365 anymore, but I don’t respect MS enough to bother to Google what they’re calling it now.
Part of me wants to plug Thinkpad E16 as the cheapest new laptop you can get away with, but if the trackpad is the same one that drives you insane. Honestly, I don’t really care about the trackpad because I exclusively use Trackpoint.
Also, I would call the speakers mediocre, but honestly, I rarely listen to audio on my laptop, so they may be total crap.
AMD GPUs are officially supported in the Linux kernel and Mesa. They pretty much just work out of the box with minimal setup on a fresh distro install.
NVidia GPUs often require out-of-tree proprietary drivers to work with full performance; these drivers are often a pain to install and update. Supposedly, things are getting less terrible now, but NVidia is still overall more likely to cause you pain than AMD.
Intel Arc dGPUs, like AMD, have decent native kernel and Mesa support from what I can tell, but tend to have worse performance than AMD. However, I hear they’re ridiculously good for video encoding!
What do you use Photoshop for? I ask because if you're just having fun with it or making simple edits like saturation or color curves, it's probably easier to find a replacement. GIMP still has a bit of a clunky interface, but has become much more livable since it got some non-destructive editing in 3.0. Personally, I use a combination of Inkscape and GIMP for a lot of stuff.
However, if you're using Photoshop in a professional capacity as say, a photographer or a graphic designer, I'm not sure you can effectively abandon Photoshop. As much as I hate Adobe, Photoshop is unfortunately an industry standard, and it's rather difficult to get running reliably under Linux. There are ways, but I wouldn't call them reliable. I thus can not in good conscience recommend you switch all your machines to Windows, though perhaps you can run Linux on one device and keep a dedicated Photoshop box if that's possible for you.
Everything else should probably be fine. Depending on what you play, you might lose a few games to kernel-level anticheat, but honestly, my thought is "Why should I give a company access to an important part of my operating system just to play a video game?"
As others have said, you should probably use LibreOffice instead of OpenOffice; the latter isn't really developed anymore, and the former maintains compatibility with your old files while having vastly better maintenance and feature updates.
Spotify and Discord both have native apps for Linux, so you should be good. I don't really use VPN services (I could rant about why, but that's best left for another time), but there's probably ways to get them working.
Persistence should be near impossible; you most likely have a bad habit or other factor that makes you vulnerable. As others have said, check your router settings; make sure your router firmware is the latest to patch any vulnerabilities. Check devices on your network to make sure none are compromised.
My first guess, like others, is you're doing something horribly wrong with your port forwarding, followed by you're installing suspect software. Don't go installing from random Github/Gitlab repositories without at least doing a bit of background research. Also, sometimes even legitimate open source projects get compromised. Ultimately, try to stick to the bare minimum, just stuff from the Debian repos, and see if it still happens.
If you still have the problem, then my last resort is to ask this (and this is really paranoid, hopefully an unlikely scenario for you): do you use your computer in a safe environment where only people you trust can access it?
I mostly ask because if not, maybe someone has physical access to your computer and is pulling an evil maid attack, installing the software when you're not looking. Maybe it's a jerk coworker. Maybe it's a creepy landlord. A login password is not enough to defend against this; it may be possible for the attacker to boot off a USB stick and modify system files. The only way to prevent this is to reinstall and use full disk encryption, which I do on my laptop. You can try to use Secure Boot and TPM1 to add further protection, but honestly, your attacker just sounds like some script kiddie and probably won't perform a complex attack on your boot partiton.
1: Despite their obnoxious utilization by Microsoft, they can actually be quite useful to a Linux user, making it possible to set up auto-decryption on boot that doesn't work if the boot partition has been tampered with (in which case you use a backup password).