rossomesauce489 If removing the Sims 4 folder works, that means the problem was something in that folder, and the next step is to test its contents. Most files and subfolders can be discarded, as the game will recreate them when necessary.
If you use mods or custom content, that's the place to start testing. You can look for updates for your existing files, or test in batches, or use the 50/50 method, whatever works for you.
https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method
Once you've sorted through your mods and cc, you can add back the contents of the saves and Tray folders, plus Screenshots and Recorded Videos if you care about those. None of these files are likely to cause any problems with the game itself, although you could of course have a bad save that can't be loaded. In that case, the other saves should work fine.
If you add back all this content and your game won't load, and the issue is NOT a specific save, it would be best to remove the saves folder and test again, and if that works, add back your saves more slowly. I've seen the occasional report of a bad save causing crashing at or before the Main Menu.
