There's still room for improvement, but Linux gaming has come a long way in a short time.
I remember when Proton launched it was like magic playing games like Doom and Nier Automata straight from the Linux Steam client with excellent performance. I do not miss the days of having the Windows version of Steam installed separately.
Genshin being paid by Apple to withhold 120 FPS from other devices (and controller support from other mobile devices), plus their invasive anti-cheat, plus the fact that Mihoyo is a Chinese company (which makes the aforementioned anti-cheat even more scary to touch) makes me not want to touch the game with a ten-mile pole.