Are you using Steam? What game isn’t compatible with Linux and/or requires significant user effort to run?
Honest question, what do you consider not compatible? I switched to Linux earlier this year and 100%'d Armored Core 6 (Verrrrry good game everyone should play it) and I’m currently playing through Cyberpunk 2077 + Baldur’s Gate 3 co-op with friends. If AAA games like these work pretty well I’d assume the vast majority of those 60k games work as well.
I’ve spent countless hours playing a game called Romance of the Three Kingdoms XI with PUK, which comes with its own DRM (non-Steam). Despite its availability on Steam, I’m hesitant to buy it again for the same experience, especially since it doesn’t run on Linux.
Another game I enjoy, Dead by Daylight on Steam, consistently runs into issues such as severe memory leaks, unresponsive spacebar after alt-tabbing, random freezes, and occasional stutters no matter what troubleshooting I attempt.
Lastly, my wife and I frequently play Fall Guys. While it’s mostly audio-related, there are occasional random disconnects that never happen on Windows, which can be frustrating for a game meant for casual enjoyment