Yeah good luck with games, support on Linux has gotten way better over the years but it's still severely lacking (mainly due to anticheats or game developers intentionally not supporting Linux). Even with games that you can play on Linux, they require an annoying amount of tweaking to actually get running.

Steam Deck gives me hope for Linux gaming but I don't think it'll ever have as much support as Windows gaming, in fact a surprisingly high amount of games have a Linux detection system that blocks Linux players because fuck you I guess...

But you can't really blame Linux for this, it's mostly the fault of aggressive anticheat that shouldn't exist in the first place, or shitty companies wanting to block Linux players from playing their games.

As for Nvidia, I've personally had no issue and in fact I run into more situations where having an Nvidia graphics card is better – encoding (great for recording games) and DLSS, for example. But that's just my experience, I'm sure it's just coincidental because I don't play that many games anymore.