Hi there, whoever suggested linux for your switch played a mean joke on you. Granted, arch works well if you know what you‘re doing, apparently. But no way it is a good starting distro.

I‘m not sure how eldenring works on linux but most games run without problems.

One little caveat is this: you need to understand that windows is a billion dollar product while linux is mostly community driven. It costs nothing, except many people donating their time. So I‘d suggest adopting a „its insane that hobbyists are able to build something like this“ view. Otherwise you‘ll get frustrated and will end up im privacy invasive windows territory again.

If you want a more gaming ready distro, try pop os or bazzite. Good luck