Sims 4 crashing

sims44560​  As a test, please try playing in a clean user folder.  Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop.  When you launch the game, a clean folder will spawn with no content.  (Your saves and other content will be intact in the folder you've moved but temporarily unread by the game.)  Don't add anything to the new folder yet; just see what loading times are like on the initial screen and after you've created some fresh sims.

If loading times are still long, please try again, but with your computer offline.  You can sign into the EA App and put it in offline mode, then disable wifi and/or disconnect the ethernet cable before pressing Play.

If that doesn't help either, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

If one of these steps helps, let me know which one, and we can go from there.  I'm not saying you need to abandon your current save or other content, only that it's necessary to test without it to narrow down the source of the problem.