Re: EA App says the sims is running no matter what I do.

@mschewwi  Please run a couple of checks of your Windows system files:

• 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 /Checkhealth” without quotes, and enter
• If the scan does detect corruption, stop here and let me know
• Otherwise, hit Windows key-X again and open “PowerShell (Administrator)” or “Windows Terminal (Administrator)"
• Inside the window, 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 and open “PowerShell (Administrator)” or “Windows Terminal (Administrator)” again
• Inside the window, copy and paste “sfc /scannow” without quotes, and enter
• Post the message you receive here

Restart your computer before trying to play, and don't put the old Sims 4 folder back in Documents > Electronic Arts yet.

If that doesn't help, since you've covered almost everything, please do a clean uninstall and reinstall of Sims 4 and the EA App.  Start with Sims 4:

• Rename the Sims 4 folder that was previously in Documents\Electronic Arts to something that doesn't include the words "Sims 4."
• Download Revo Uninstaller (the free version is fine) from here.
• Launch Revo, select Sims 4 from the list, and click Uninstall.
• Once the game is uninstalled, select "Moderate" under "scanning modes," and click Scan.
• Review the list, in case there's something you want to save; otherwise, click Select All, and then Delete.
• Close Revo, and restart your computer.

Uninstall the EA App with Revo as well.  I don't have instructions for that at the moment, but the process should be straightforward.  Restart again when you're done.

Install the EA App, then create a new folder into which you'll install Sims 4.  The folder should be on the root level of the drive of your choice, for example C:\Games is fine, but not C:\Program Files\Games.

Windows Resource Protection found corrupt files and successfully repaired them.
For online repairs, details are included in the CBS log file located at
windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. For offline
repairs, details are included in the log file provided by the /OFFLOGFILE flag.
PS C:\Windows\system32>

This is the message I just received after doing the first steps you said!