https://security-list.js.org/
https://github.com/pluja/awesome-privacy

Check out the community at https://kbin.social/m/leagueoflinux ; they even have a wiki with instructions on how to install LoL and other things.

Returning to your issue. Is Leagueoflegends.exe present in the Wine folder? If there is, attempt to fix the path in lutris; if not, try reinstall.

I prefer Linux Mint, but I don’t believe there is a “best” for gaming; simply select the one with which you are most familiar.

Nobody knows. Apple says no data are collected, but companies lies. In the past apple was sued for collecting user data despite opt-outs.