Opening up a brand new URP project in Unity 2022.2.20, I get this endless loading bar. It also happens upon exiting unity in Unity 2021 LTS. I do not use Plastic SCM or Unity Version Control. All users have Full Control of the Project folder in Windows Security Settings. Any ideas?

I miss Unity5 and MonoDevelop. Those two things ran SO FAST!!!
You’re not alone:
https://discussions.unity.com/t/847630
https://discussions.unity.com/t/859030
I’m not sure why you mention this, but if you’re not using it, get rid of it!
Here’s how:
Extra unwanted packages in new projects (collab, testing, rider and other junk):
https://discussions.unity.com/t/846703/2
About the fastest way I have found to make a project and avoid all this noise is to create the project, then as soon as you see the files appear, FORCE-STOP (hard-kill) Unity (with the Activity Manager or Task Manager), then go hand-edit the Packages/manifest.json file as outlined in the above post, then reopen Unity.
Sometimes the package system gets borked from all this unnecessary churn and requires the package cache to be cleared:
https://stackoverflow.com/questions/53145919/unity3d-package-cache-errors/69779122
This happened to me when I copied two large animations into the project. The animations are several gigabytes per file. And I know it is large files because it happens only when I go to the folder where I have these files. So avoid large files while possible, or put them on a separate folder.
I had this problem even when using Unity 6 LTS. If I changed the layout on my Unity Editor (for eg. stretched out the inspector and so on), I always got this loading modal. For me the problem was that I was using two extended displays of different sizes. Unity always crashed when I was using Unity on the one with lower size.
The problem was fixed after I switched that monitor with another. In this case I was using two monitors of the same size.