I don't want to talk about other peoples experiences when it comes to games and graphics drivers on linux. I can just mention my own experiences with it. As a disclaimer I have used linux for years, just not as my main desktop.

Graphics drivers I have not had any issue with, they've been pretty plug and play. Games I've found can be a bit hit and miss, most will just work fine right away through proton or wine while others can require a bit of tweaking and troubleshooting to get running properly. I have yet to run into a game that just would not run at all however, but that could also just be that the games that wouldn't run are ones that didn't interest me already.