I tried gaming on Linux awhile back, my biggest problem was how spotty the nVidia drivers are. I realise nVidia is mostly to blame here, but it's definitely still a problem that's preventing me from ever really being able to game on Linux (Ubuntu.)

With a goal of 1440p@144hz, and someone who appreciates visual fidelity, I own an RTX 2080 Ti, and there's just far too much of a performance penalty for linux gaming.