Yeah, the Repair Install would have wiped out Restore Points and Updates History. These should always be the first line of defense, to restore before the Update, if it fixes it and the update reinstalls and repeats the problem, restore or uninsall it again and block it.
If it's the same issue as this: https://www.makeuseof.com/windows-11-breaking-p...
then it may be fixable by creating a new Local Admin account:
https://www-isumsoft-com.translate.goog/windows...
Sign into it to see if the taskbar is fixed, and everything else works well. If so move your files over via C:\Users, test all programs run correctly, then when ready delete the old account:
https://www.tenforums.com/tutorials/5464-delete...
You can then link your MS account to the new one if desired: https://www.tenforums.com/tutorials/5375-switch...