Struggling to update or install Sims 4 since legacy update

Hi!
Ever since the legacy update came out (rouighly, could be a bit after) I'm struggling to update or reinstall sims 4. It keeps telling me "Folder doesn't exist" even though it 100% does exist. 
I first noticed the issue after I bought the legacy games Sims 1 & 2 and played them for a bit (I struggled to install these at first and followed instructions here: https://forums.ea.com/discussions/the-sims-1-en/the-sims-1-crashes-on-launch/11850467/replies/11852221 on how to get it to work), when I went back to Sims 4 about 2 weeks later it needed an update and the error happened. I then was able to just continue the download by ignoring the error, however once "updated" the game would then not start (It would show up in my task manager using 0% CPU and about 200mb memory, even leaving it for hours it wouldn't actually come on though).

I managed to delete & reinstall the game somehow (I think by disabling all firewalls etc) when Businesses & Hobbies came out, however, it kept crashing all the time (just freezing out of nowhere and I had to restart my PC).

I use 0 mods or custom content.

I bought my PC in January this year to upgrade from an old gaming laptop. The specs are:
AMD Ryzen 5 5500 3.60GHz, 16GB RAM, Latest Windows 11 installed and latest Nvidia graphic drivers. I got one 125GB SSD with windows on and a 500GB HDD with the EA App and Sims installed on (Originally EA was installed on the SSD but I deleted and reinstalled on the other drive, I even created a folder on the drive called "Games" as I read somewhere that just installing it onto the drive could be the issue, still doesn't work)

I'm so frustrated, I just want to be able to play this game I bought my PC for! 

Anyone got any ideas what I can try?
I already searched and tried a lot of related issues/fixes but nothign actually helped.