Verify also Steam Linux Runtime - Soldiers in your library, then verify the game files, and then cleanup the wine/proton prefix for that game (delete or rename the folder for backup) located at ~/.local/share/Steam/steamapps/compatdata/{APPID} where {APPID} is the steam Application ID. Beware that deleting this folder will reset all current game config or save files, which may or may not be reaquired automatically depending on the game and if it supports Steam Cloud save.
This should at least create a proper base to start with.
Give also your system information every time you open a thread, if not relevant to you on the moment it never hurts to give it, and is often needed anyway to help you troubleshoot your issues.
If you can start Steam from terminal, the Steam log output can be visible to you in real time, so you can also spot issues from here.