@stickysara Your dxdiag lists a few generic Windows errors, so it's a good idea to clean those up. Please run a couple of basic 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 /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 again
- Again, choose “PowerShell (Administrator)” or “Windows Terminal (Administrator)”
- Inside the window, copy and paste “sfc /scannow” without quotes, and enter
- Post the message you receive here
Restart your computer, hit Windows key-i, select Update & Security, and click the box to check for updates. If any install, restart again afterwards.
For the Sims 4 issue itself, if you have Logitech's GHub installed, try disabling it in the Task Manager or even uninstalling it, temporarily, to see whether it helps. If you do merely disable it, make sure it doesn't start up again right away.
If this doesn't help, please let me know whether you still get lag in a new save with no mods present. If the new save is fine, let me know how large your current saves are. You can see their size if you view the saves folder in detail mode.