I’m not familiar with mint, but maybe you can see whether you can easily downgrade to the previous version you had. And hold off on the updates until a fix is published for the broken stuff.
But before that, take a look at the mint communities and see whether it’s a known issue and whether there is a manual intervention needed to fix it. Something like “newest update broke some proton games”, etc.
Can you pinpoint what you did to your system before? Did you do a system update? Did you move game files around? Did you add any repositories trying to install something that also updated other dependencies, or alike?
Help. Various games stopped working and i have no idea how to diagnose the issues
What stopped working:...