It really depends on the game. Old games often run better on Linux than on windows. Check protondb to see how supported the game is, may be a driver issue. Old Nvidia parts use proprietary drivers which suck in comparison to old AMD parts which use open source drivers on Linux. New Nvidia parts use open source drivers, though these drivers are new and still having the kinks worked out. Sometimes laptops even have specific proprietary drivers that must be used for the laptop which can break compatibility with Linux or reduce performance. I’m pretty sure Intel is in the same boat, it’s proprietary.
Personally, for games I enjoy, I saw a small 5fps performance increase over windows on a newish desktop.
+1 to op for posting the solution godspeed 🫡