Sims 4 will not start after installing new graphics card

Hi everyone,

I upgraded my graphics card from a 1070 to a 3080 in November 2020. Before, I had no issues running Sims 4 on the 1070. After I installed my 3080, the Sims 4 instantly stopped working. I click on the game icon, and nothing happens except the loading wheel appears by my cursor before going away after a second. Then, the origin client pops up and I get the status "In game - Playing the sims 4 digital deluxe" but no game window appears. Then, I tried playing with origin in offline mode, and when I try that, I get the error "Displayname field missing from registry" and it prompts me to enter my login information on an infinite loop with the error box constantly reappearing every time I enter in my origin information. 

I tried using my friend's origin account (she also owns the sims 4) to see if it was an issue with my account or my computer, and the sims 4 did not start up for me either. I also installed the Sims 2 and it ran fine.

I then installed the Sims 4 demo version off of steam and it started but I got the error "unrecognized video card - your video card was not found in our database". Since I started having my issues with the Sims 4 not starting when I installed my new GPU, I think that the issue has something to do with my graphics drivers.

Here's a list of what I've attempted so far:

• Clean boot
• Clear origin cache 
• Uninstall/repair the game multiple times
• Uninstall/repair origin client multiple times
• Completely uninstalled and reinstalled graphics drivers
• Updated windows
• Edited my Sims 4 registry file (following EA guides)
• Edited my origin registry file (following EA guides)
• Tried starting the Sims 4 in windowed mode (both via the Origin client way and the Nvidia Geforce experience way)
• Disabled origin in game overlay
• Changed origin library game path 
• Ran touchup.exe file in the game's __Installer folder
• Followed this guide -> https://answers.ea.com/t5/Origin-Client-Web-Technical/Origin-Client-Move-Locate-Installed-Games/td-p/5776562/highlight/true/page/16
• Disabled fullscreen optimization in the Sims 4

I'm not able to get a config.log file since that requires me having started the game and having an Electronic Arts folder, but since I have not been able to start the game since November 2020 and have uninstalled/reinstalled multiple times, I do not have an EA folder anymore (since it requires having started up the game at least once to show up/be created).

I've attached pictures of the error messages I've gotten and my DxDiag file. 

I would seriously appreciate any help. I've contacted EA help 6 times now and they always link me the same guides that I've followed to no avail. I have 700+ hours put into the Sims 4 alone and I want to play again so badly!!