It's very very rare for me that games don't work. It's almost all competitive games, where the game specifically does not allow anti-cheat.

There's very little fiddling around or configuring. 30% sounds god awful terrible; my success rate definitely >85%. In the rare case something doesn't work right away, https://www.protondb.com/ usually has advice in the top or second comment that works great.

I don't really think the windows vs Linux native debate is worth pursuing. Windows games run better than they do on Windows 4 times out of 5, and that's more than good enough.