Re: Crashing on intro screen!
@CDP445 The particular errors in your dxdiag are almost always caused by a conflict between Sims 4 and something else running on your computer. So please try again, still in a clean boot, except this time also disconnect all nonessential peripherals, which basically means everything except your keyboard and mouse. Even if you'd never play without headphones, it's still a useful test.
If that doesn't help, try playing in a new admin Windows account. Make it a local account, as in, don't link it to your Microsoft account, and don't sync with any other services you normally use. You'll be able to sign into the EA App and launch Sims 4 without needing to reinstall anything.
These errors aren't usually specific to one account, but it should only take a couple minutes to make a new account and test the game. If that helps, it points to something in your main account, and we can go from there. If not, you've eliminated the account settings and user data as possible causes.