xolauv Try manually reinstalling DirectX 9, which Sims 4 still uses by default. You don't need to uninstall anything; just run the installer over the top and restart your computer.
https://www.microsoft.com/en-US/download/details.aspx?id=8109
More detailed instructions are here if it helps:
https://answers.ea.com/t5/Technical-Issues-PC/Sims-3-launcher-won-t-open/m-p/10711778#M247861
If that doesn't make a difference, try switching to DirectX 11 mode:
https://answers.ea.com/t5/PC/Enabling-DirectX-11-For-Sims-4-on-EA-app-and-Steam/td-p/13711976
If that doesn't help either, please look for new errors in the Reliability Monitor. Hit Windows key-R and enter perfmon /rel in the run box, and you'll see a chart of errors and updates with a column for each day. Today is on the right.
Look for an error that happened at exactly the time you tried to launch Sims 4, specifically after reinstalling DirectX 9. If you find one, right-click its name and select "View technical details," then copy the information there and paste it into a reply. If you don't see an error, check back in an hour or so—the RM doesn't always update right away.
If you happen to see errors corresponding to your trying to launch the game in both DX9 and DX11 modes, I'd like both of them; just let me know which is which.
If you find no errors at all, even after an hour or two, that means the game is likely being blocked from loading. In that case, please check your antivirus for any Sims 4-related actions.