Most stock apps won't launch after Big Sir Update

I updated my late 2014 iMac Retina 5K to Big Sur last night. Before the update everything was working normally. After the update, there's a big handful of stock apps that will not open and the desktop does not function properly. It will take up to 5 minutes for anything on the desktop to appear, and the only things that work on the desktop are folders. Documents and/or media on the desktop will not open.

I've done the following steps:

• Force Closed apps that kept "bouncing" on the dock
• Soft restarted and hard restarted iMac
• NVRAM Reset and SRAM Reset
• Booted in SAFE MODE (Problem still existed in SM)
• Attempted to change permissions on the apps that don't open, but was not able to (logged in under Admin)
• Hard reboot and installed a "fresh" version of Big Sur.

This issue ONLY happens under the main admin profile. If I log in under another user on the Mac, everything works fine. Google Chrome works fine for the most part, but I had to type the last half of this post on an online notepad and copy/paste it into this form so I could make the post.

I've never had an issue with this Mac before starting from when I got it in late 2014, and this hurts to have it all go to crap this fast. Help please :(

[Edited by Moderator]