Double-check that the new admin user account does not have any login items set.
Safe Mode uses a more basic GPU driver. You could always try booting into Recovery Mode and reinstalling macOS overtop of itself. Even though this should not affect your data, you should still have a good working backup just in case. I'm not sure of the correct procedure to reinstall Catalina if you don't erase the whole physical drive since Catalina now has a read only system volume separate from the read+write user volume. I've never had to reinstall Catalina overtop of itself. This is the only Apple article I can find about installing Catalina and it does not mention anything specific about the new disk layout. Maybe the installer is smart enough to figure things out automatically when reinstalling overtop of itself.
https://support.apple.com/en-us/HT201475
Otherwise the most likely cause is one of the other apps running at startup. The next most likely culprits which would have ties to the display would be EA Origin and Steam.
It is also possible this could be a hardware issue. It wouldn't hurt to run the Apple Diagnostic. A passing diagnostic result doesn't really mean anything, but if the diagnostic reports a problem then that may be significant. The only sure way to eliminate software issues is by performing a clean install of macOS by erasing the whole physical drive and reinstalling macOS without migrating or restoring from a backup. If issues exist with a clean install, then you will need to contact Apple directly since it either indicates a hardware failure or a macOS issue.
To erase the physical drive while in Recovery Mode you will need to click on "View" within Disk Utility and select "Show All Devices" before the physical drive appears in the left pane of Disk Utility. The drive should be identified something like "Apple SSD ....". Erase the physical drive as GUID partition and APFS (top option). After erasing the physical drive select "Reinstall macOS".
Make sure to backup your system first.
