YSK: Here's a list of browser extensions to un-shittify Youtube
Why YSK: Youtube's enshittification creates an abysmal experience. There's a list of Chrome extensions I've collected over the years that each fix an aspect of Youtube to bring back a genuine experience. I've seen in comments people mention one or two of these at a time, so this is a pack that contains everything you could need, and more.
Sounds like OP actually interacts on the site with comments and likes and whatever so I can't account for that.
In my case I get by with a combination of freetube and tubearchivist. I expect that one day youtube will find a way to finally close the door on this type of freeloading. Hopefully that will provide the incentive for more people to use more platforms.
I like interacting with actual YouTube because it keeps track of my subscriptions and watch history across my devices. (It's not that I want Google to know my habits; it's that I don't want videos I already watched coming up in my feed.)
If one of these YouTube alternative front ends would solve for that use-case without too much faff and hassle, I'd happily switch.
I need you to understand that manually exporting and importing subscriptions isn't even slightly like automatically synchronizing watch history (including non-subscribed channels).