Re: sims 4 crashing on main menu after startup
@tiamohyunjin Please remove GShade entirely, then repair the game: open your EA App game library, click Sims 4, and select Manage > Repair. If the game still crashes, please run a dxdiag and attach it to a post.
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
If the game runs fine now, you can try adding back GShade, but please keep in mind that it hasn't been getting along well with Sims 4 lately. That would be an issue for the GShade developers to address.