The federal government argues Google has smothered competition by paying companies such as Apple and Verizon to lock in its search engine as the default.
Its the easiest thing in the world. I degoogled everything in my life in like 2-3 days after work. People aren't switching because the bulk of the world's populace likes the centralization and using the popular option. They just want to use what everyone else is.
I think if you were to ask "most people" about which search engine they prefer, they wouldn't really understand the question. I remember in highschool a teacher asked someone what operating system they have at home, and she replied "I think it's Microsoft Office".
Tech people tend to severely overestimate non-tech peoples' understanding of tech.
I am lucky my husband likes to learn about this sort of stuff. When we started dating he barely knew the difference between Mac and Windows. Now he uses Linux. Granted, I have to install it, but he keeps on top of maintenance.
While I don't believe you can degoogle that quickly, because some of their services take quite some time to properly switch, such as email, in the end it's not too hard, but just takes time and some work.
Changing email is easy, if you don't mind it being a slow process. Just forward your google email, and start slowly replacing any service you notice in the following months/years to your new address.
Google Drive is harder to replace, I went for just running a NAS with Nextcloud, which takes care of most of Google Drive/Docs/Calendar stuff. If self-hosting isn't your cup of tea, Proton is slowly setting up usable google alternatives - they have Drive and Calendar IIRC.
Now for phone, that's the hardest task. You wouldn't help yourself by getting an IPhone. While it would de-google you, there's basically no point in switching google for apple. Getting android to be usable for stuff like banking, MFA and other bullshit you need your phone for while being degoogled is hard, due to the bullshit Google Services. The only solution I found is to either just go with dumb phone with an obscure OS, or just get a Google Pixel and run GrapheneOS.
Maps are another issue, but thankfully we have a local https://mapy.cz/ , which is a pretty OK alternative to Google maps for our country, and I guess they even work worldwide. I don't drive a car, so I don't really need it that often.
The only remaining Google service I use is GCloud VPS, because I have some websites running there on the free instances that I'm too lazy to move. But I'm slowly migrating it to Amazon. Not that it would help much, anyway. And also Youtube, but I'm trying to go through the alternative front-ends as much as possible.
Migrating email alone is a huge pain. To be truly independent you need your own domain in case whatever provider you choose goes to shit. Any decent one will cost money. Now, most people don't even know what a domain is, let alone where and how to buy it and use it for email. They also have to pay that mail provider, configure everything and migrate their old emails and forward their old mail. Oh and now they also have different logins everywhere, and because they probably don't have a password manager either they need to get one or just have different logins for different things.
That's ... a gargantuan task. for an average person - even if you provide them with a rough outline of what they'd need to do they probably wouldn't be able to do so without help.
Also, as a side note, what do you use for watching videos? What phone do you have? What maps do you use? It's not so easy to "de-google" completely.
Migrating emails isnt that hard if u dont set yourself a deadline. Some services like proton offer migration and forwarding from google and you can just slowly update them as you use it. I myself got tutanota and anonaddy and going through my bitwarden entries updating different alias for everything for the past couple days. Still gonna keep the gmail accounts around for emergency but will slowly disassociate from it.
Takes a while but you can just stick with updating them when you do use it if you dont have the time or feeling lazy. For an average person who doesnt value privacy, they have no reason to move out of google anyway so gmail will always be the popular one unfortunately.
This is how I did it. Set up a Protonmail account with my own domain, and set all my Gmail emails to forward there. I set up a special folder for all forwarded mail, to remind myslef that I should change my email on that service, and every time I logged somwhere or received an email from an important service I use, I made sure to change my address there.
It has already been several years, but I think I've managed to replace it everywhere within a few months. I haven't seen a forwarded email in months, so I think I'm finally done.