Wow! lmfao
- Reset Windows Update: https://docs.microsoft.com/en-us/windows/deployment/update/windows-update-resources
- Code 0x80004005 is specific to dual boot, provided you information how to remove dead system. Not good enough for you.
- Possible it could be bad ISO, it can happen, bad connection. Build 21359 came from the dump, the uup files came from MS. Get that straight, the ISO did not come from MS. The script can cause issues itself, especially run on a corrupt system.
- Plain simply rude comment, it was a suggestion, what your problem is with clean installing and getting over this is yours and yours alone. Build on build can cause issues eventually that get carried through on each update. With the limited information you provide, appears your system is already totally corrupted. Let's put the blame on others trying to help. Does over 30yrs experience in IT and system building good enough for you. Yep, no troubleshooting experience.
Good luck as it appears even reddit can't help you.