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Depends on what you are playing, but gaming in Linux has come a long way. Some games won’t work due to companies not enabling their (rootkit) “anti-cheats” for Linux, but other than that, there’s more and more games that simply work by the day. Check out https://www.protondb.com/ to get an idea of what’s working at the moment.
You might misunderstand how their “ratings” work - they simply collect all reports and when people had trouble with the game before, and gave a negative or “tinkering required” rating, it will show in the overall stats.