Gaming on a Linux laptop with AMD CPU and Nvidia GPU was pretty good for the 2 months I did it. Not great but definitely good. Biggest problem was with a AAA game on launch day. It actually worked decently, but had a crashing bug that was quickly fixed, and the performance was never as good as what it was once I switched back to Windows and ran that game. Another game had an issue with connecting to multiplayer games that I never resolved, but otherwise worked as well as Windows (for single player.) Everything else I played seemed basically the same as my experience in Windows.

Longer version: https://www.retorch.com/blog/linux-mint.htm