@ChiaraTravaglino I've split your post into its own thread since you seem to need some individual troubleshooting. Feel free to edit the thread title if you want.
For the issue itself, your dxdiag shows that Sims 4 is crashing because a component of DirectX 11 is crashing. So I would suggest running a couple of basic checks of your Windows system files, in part because this should repair any issues with DirectX 11 in general:
- 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.
If you just want to play, you can try forcing DirectX 9 mode. Open the EA App game library, click Sims 4 > Manage > View properties, and add -dx9 in the command line box. But please do try DX11 mode at least once after running DISM and sfc. And if DX9 mode doesn't help, or it does but you'd like to get DX11 mode working, let me know.