Re: Sims 4 will not launch on EA app

@endangered_sushi  The errors in your dxdiag are all from the EA App, mostly from its background service.  Try killing that in the Task Manager, after closing the App of course; the service will be in background processes.  Restarting your computer will also close all related processes.

If that doesn't help, uninstall the App with Revo Uninstaller (the free version is fine), and restart your computer before reinstalling.