Reintroducing pen and paper to your note-taking repertoire might not be such a bad idea, anyway -- it's a much more creative medium than most digital, textual forms.

Yesterday. Do we actually need any of this stuff? Probably not. But it's damn hard to stop enjoying it.

The moment you are reading this is not only peak digital trash, but also peak digital treasure!

That is up to you but I don't see why. Just ignore whatever these entities do, run you free OS with your free software when and how you want it and 'your kit' is yours without interference by hostile entities. You won't be able to access much of what those entities put out there but that doesn't matter once you realise their offerings aren't worth their cost.

The 'net is a big place with a lot of things going on. Drop the hostile actors and it is still a big place with a lot of things going on. The only problem you might encounter is once created by authorities which insist on you interacting with them through those hostile entities. I have thus far managed to use their applications - Swedish BankID and Dutch DigiD being the main ones - without needing to resort to any hostile entities - no Google accounts or Google services on my devices yet everything still works once I get rid of the nag screens telling me things won't work without the aforementioned.

In short, drop hostile entities and keep 'your kit'.