Are you sure? You checked them on ProtonDB or you checked them on your hardware?
I have just bought a modern AMD gpu (rx 7700xt) and now I am very surprised how almost every game works on Linux (I miss you rainbow six siedge, but I know it's the developer's fault who just chose not to enable anticheat support on Linux 🥲). Before I had Radeon R9 380 so it was quite old at this point but performance wise it wasn't really as bad but I noticed that performance on Linux compared to Windows was trash or games even didn't work at all. Now I guess it was due to how old and unsupported my old gpu was. Now everything just works and I'm shocked. Hardware is unfortunately important on Linux 😭. It doesn't need to be beefy but it needs to be somehow modern. (At least for games... Everything else worked just fine even on my old hardware)