Sims 4 running extremely slow even after reinstalling

@LadyRubrum  I'm not sure from your description whether you've tried playing in a clean user folder yet.  If not, please do so now:  Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop, and 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 moved but temporarily not read by the game.)  Don't add anything to the new folder yet; just start a new save and let me know how it runs.

If it's still slow, please run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/

Please also let me know exactly what you mean by "slow."  Are you seeing low framerates or stutter, do your sims take forever to perform an action, or something else?

Yes by slow I mean frame rate and lag. Loading screen, menu, and gameplay are just laggy. 

I have the sims downloaded on steam BTW

@LadyRubrum  Did you try a clean user folder?  Please let me know whether it helps or helped.  This is particularly important because your dxdiag doesn't provide any definitive explanation for the problems.

The one thing I do notice is that a component of McAfee is throwing errors, so please try disabling it (temporarily) while you play.  If this helps, set exceptions for TS4_x64.exe and EADesktop.exe.

Please also let me know whether you're playing with the EA App in offline mode.

Ok update:

Tried all of this didn't work, also I'm not sure how to temporarily disable McAfee from affecting the sims since I can't find the option. However I tried something new that is now living me with more questions.

I download the sims from the EA app directly this time, instead of how I usually play with Steam. The game ran like new, no lagging and running smoothly at a regular frame rate of 100 and above (Instead of the 10 FPS I'm having with the Steam version)

So yeah, I can't play this version because all my packs I've purchased from steam.

@LadyRubrum  McAfee has instructions for disabling or uninstalling in its online documentation:

https://www.mcafee.com/support/?articleId=TS103263&page=shell&shell=article-view

https://www.mcafee.com/support/?articleId=TS101331&page=shell&shell=article-view

But if the EA App version runs fine and the Steam version does not, the issue is probably not McAfee.  Instead, it's either something about Steam itself, for example the overlay; or it's something related to the packs you own in Steam, which aren't installed when you use the EA App.

Point is, reinstall the game through Steam, start a new save with no mods or custom content present, play in one of the base game worlds, and see how things go.  If you still have issues, disable the Steam overlay and close any other apps you use while playing.  If the new save is fine, experiment with whatever world you were playing in when you first had this issue.  Let me know what you find, and we can go from there.