Well, I tried using the script to leave the insider program and it didn't seem to change anything. But then I used to to join the release channel and it showed I was in the release channel, so then I used it to leave the insider program again and now my settings seem the same as in the images I sent in the previous post. I think it works, though. I also checked my Microsoft account and it no longer shows that it is registered with the insider program, so there's a good chance Microsoft was just taking its time to unenroll my account.
Every time I restart, I do get this error.I will try running SFCFix and DISM and I'll post the results if I notice anything out of the ordinary with them, otherwise I'll just try reinstalling Razer Synapse 3 (and if that changes nothing, I'll try reinstalling Razer THX Spatial or whatever it was called. It's deprecated anyway, but it could be the cause so it might be worth fiddling with. Long story short, I'll get back to you on whether or not I fix this).
KB5061087 (19045.6036) is a regular preview which will be released before the Patch Tuesday Cumulative Update, so this is not an Insider Preview. Just a beta release of the next Cumulative Update.
The only thing that seems to still be the matter is the Xbox app. It won't launch, and trying to open the settings in Game Bar caused the game bar to crash.