It wasn't wrong controller mappings, that was a Proton3.16 issue. The game works fine since 4.2 as i reported here 2 months ago: https://www.protondb.com/app/247950 It should be whitelisted, i've tested online and works.
This game crashes when pressing A button when i try to enter main menu, but only if i have SteamInput enabled, i tried the game with "force off" on game parameters and it work flawlessly. I'm using a XBOX One S Controlle...