You can always side-grade to AMD. I was using a 3070 and ditched Windows for Kubuntu and while it was very usable, I would get the slightest input lag and had to make sure the compositor (desktop effects) was turned off when playing a game.

After some research I decided to side-grade to the 6800 and it's a night and day difference. Buttery smooth gaming. It performs better with compositor on than Nvidia did with it off. I know 6800 isn't high end but it's no slouch either. AMD is king on Linux.