whats the difference between gaming on linux and running windows games on linux? isnt both of them gaming on linux

protondb as good as a resource it may be, i tried it often, with anno 1404 too, but i honestly dont recall tweaks there ever working for me (for games rated to be running of course, i dont try games that are rated in the red naturally)

I see that linux is pretty good in benchmarks and i believe it so too, however, that is not the case for me and im at a point where im torn between “something is wrong with me and my setup” and “what voodoo is everyone else using that they arent telling me?”