The game crashes as soon as I start it

@Miiginu  The Sims 4 errors in your dxdiag point to DirectX 9, and normally, the solution would be to reinstall it.  You can try, if you want—there's no harm in running the installer from Microsoft:

https://www.microsoft.com/en-US/download/details.aspx?id=8109

But given your Windows 10 build, the issue is likely a recent security update (KB4515384) to Windows Defender.  A number of people have been unable to play Sims 4 since this update, and several of them have reported that uninstalling it made the game work again.  However, security updates exist for a reason, and uninstalling one is never recommended.

If you'd like to troubleshoot in other ways, I wrote out the following steps for someone else with the same issue.  (No word yet on whether any of them helped.)  Since not all players with 1903 and the security update are affected, there must be some other element that contributes to the problem.  (I don't have 1903 yet myself, so I haven't been able to test.)  Even if none of these steps help you, please let me know, since it'll still be useful information.

Edit:  I saw this mentioned elsewhere, and it may or may not help (and perhaps only temporarily), but please disable Origin in-game both globally and for Sims 4.  To change the global setting, hover over your Origin username, select Application Settings, then More > Origin in-game.  For the TS4 setting, open your Origin library, right-click on the TS4 icon, and select Game Properties.

Start by trying a clean boot:

https://www.windowscentral.com/how-clean-boot-windows-10

If that doesn't help, set exceptions, in all antivirus/firewall programs you have installed, for both Origin.exe and TS4_64.exe.  Please also set an exception in Controlled Folder Access (a feature of Windows Defender) for both.  It should only be necessary to add TS4_64.exe, but might as well be thorough.  Here's how to change Controlled Folder Access settings:

https://crinrict.com/blog/2019/03/windows-10-defender-controlled-folder-access.html

Please also remove your entire Sims 4 game folder from Documents\Electronic Arts while testing.  A clean folder will spawn each time you launch the game, as long as it gets far enough.  Be sure to delete this clean folder after each test.

In addition, temporarily disable OneDrive (no need to uninstall it) while testing.  Here's how:

https://www.windowscentral.com/how-disable-or-uninstall-onedrive-windows-10

If these steps don't work, please try all of it again, this time adding another clean boot.