[Renate]

Is lpunpack still showing 131072 for odm.img?
Could you run that again?
I'm getting that also with 7zip, not particularly a reputable source on LP, but certainly another opinion.

Your lpunpack in #43 is screwed up.
It's not paying attention to the logical block size.
It's using 512 when the geometry clearly uses 4096.
Where did you get that from, some Debian thing?

There were two rounds of screw-ups on my part:
1) a typo
2) a mismatch on starting point because of that 1 MB vs 8 MB thing.

But the last time should have been correct.

I don't know how you "got ADB" before.
Were you talking to the stock system, but without the Android subsystem running?
Or stock recovery? Or custom recovery.

As I said before, zip up the /metadata and post it.