Hi Ruthan, it sounds like you’ve been dealing with a pretty frustrating issue! It’s really confusing when the logs don’t show the expected results or when you're stuck trying to parse them. From what you’ve described, it seems like you're trying to work around some issues with measured boot logs and the boot repair process.
One thing that might help is focusing on resolving the bootstat.dat issue first, since it seems to be one of the key causes of your boot repair loop. Have you tried clearing the bootstat.dat file manually using the recovery environment or the Command Prompt in WinPE? Sometimes that can break the loop.
Also, regarding the NTBTLog and measured logs, if the tools you're using are failing to give you the details, you might want to try a fresh install of the Windows ADK tools, as they usually have the right utilities like PCPTool.exe and others for analyzing boot logs. I get what you're saying about not wanting the entire driver kit – you might only need the specific parts related to the boot process. Alternatively, it could be worth trying the "Offline" options in Autoruns from WinPE, though as you’ve mentioned, some entries may be locked down.
Lastly, regarding merging files from the broken install with the old backup, I’d suggest carefully checking the system partitions and making sure everything is in sync before trying a merge, as it can get tricky. If you've got a system image or a restore point from before the issue started, it might be worth trying that too.
Hope this helps or at least gives you another direction to go in! Let me know if anything else comes up or if you need more clarification.