

Minor update on this: I ended up returning the Samsung G80SD since it was being a finicky piece of shit in other ways and got an HP Omen Transcend 32 instead (I know, HP sucks, but I have nothing but good things to say about my HP Omen 27i so I took the chance). Same exact 3rd gen QD-OLED panel but this time it just works™. 240hz, VRR, all good out of the box.
So my point about the monitor is kind of moot, the G80SD just sucks, Linux is fine.
Some racing recommendations:
Midnight Club 3 Dub Edition
Enthusia
Need for Speed Hot Pursuit 2 (the PS2 version is the best one)
Burnout 3 Takedown AND Revenge, both are stellar
Tokyo Extreme Racer 3 and Drift 2