I have been playing Elden Ring just fine on Linux. At launch, I was worried about it and installed Windows just to play the game. After a while I tried it on Linux and the experience is almost 100% identical in terms of performance.

Part of your issue is having to wrangle with Nvidia drivers. I am just using the default open source driver for AMD that comes built into the kernel and the experience is seamless. I know the nightmare of getting graphics on Linux working right which is why I avoid Nvidia.