@xokimixo First of all, it's never a good idea to install a driver suggested for someone else. You were lucky here in that the driver is also compatible with your processor and graphics chip, but that easily could have not been the case, and you could have ended up with a driver that's technically compatible but not the right choice for your machine. If you're not sure, it's always best to ask for advice for your own system; the info in your dxdiag would make it clear which driver(s) you needed.
Your dxdiag shows a few generic Windows errors, so please run a couple of basic checks of your Windows system files:
- Hit Windows key-X
- Choose either “PowerShell (Administrator)” or “Windows Terminal (Administrator),” whichever option is offered
- Inside the window that appears, copy and paste “DISM.exe /Online /Cleanup-image /Restorehealth” without quotes, and enter
- The system will start validating soon. If it throws an error, please list it here
- After it reaches 100%, hit Windows key-X again
- Again, choose “PowerShell (Administrator)” or “Windows Terminal (Administrator)”
- Inside the window, copy and paste “sfc /scannow” without quotes, and enter
- Post the message you receive here
Restart your computer, hit Windows key-i, select Update & Security, and click the box to check for updates. If any install, restart again afterwards.
The EA App also crashed a couple of times, so please uninstall it with Revo Uninstaller (the free version is fine), and restart your computer before reinstalling.
For Sims 4 itself, how does the game run immediately after you restart your computer, with nothing else open except the EA App? Please test with the App in offline mode as well. You won't be able to use the Gallery, but this is a helpful way to reduce the App's resource use. And test with no mods or custom content present at all, at least for now.
Finally, please let me know how the game runs, not just that "it feels like there's something wrong" but exactly what it's doing that isn't normal.