Did you update your drivers? If so, use the previous one that worked but use DDU to uninstall them in safe mode, then reinstall. If that's not the issue, check the game files for corruption using I guess Steam? or Whatever launcher you use. Also, check temps see if it's overheating. Sorta need more info than this, but there's a few ideas. Hint: driver 20.8.3 is pretty decent.
"It worked before you broke it!"