@MrGreenTreez Please do a clean uninstall of Sims 4 and the EA App with Revo Uninstaller. Here's a detailed description:
https://answers.ea.com/t5/PC/CURRENT-ISSUE-Sims-4-DLC-shows-as-installed-won-t-load-in-game/m-p/12942151#uninstall
If you own any packs through Steam, reinstall the game through Steam; otherwise, reinstall through the EA App. Don't add any other content yet: no mods or custom content, no lighting tweaks or Reshade, nothing at all. Just see whether you can play.
If you can't see the game, try forcing it to open in windowed mode. Go into Documents > Electronic Arts > The Sims 4, open Options.ini, search for fullscreen , and set it to 0 (zero).