Removing snap from Ubuntu, at least, seems to be more impossible with every update as far as I’ve heard. Apparently it just reinstalls itself if you try to use apt in order to install eg. Firefox and then uses snap for that package. So I’d guess actually disabling snap would mean somehow configuring or editing apt itself or some addon to it.

Basically you need to have a list of packages to avoid in your head. :) And with every passing release there are more. Great!!

Since I've gone back to using Ubuntu I've managed to avoid these traps somehow.

Wann Klage gegen Canonical wegen Monopolstellung?

While their practices suck, they don't exactly have a monopoly. If they're eventually bought out by MS, something could happen. (So far, MS seems happy (and capable) to do its own thing though.)

In Englisch nem Deutschen zu antworten fühlt sich affig an lül

Yeah, but this is a public thread in an English-language community.