Wow 10+ hrs for that surgery?
Did you request a copy of the surgical report? I think that is what it is called.

Someone should be able to give you an answer as to why it took so long.
If there were complications, there would/should be a record of it and that 10+ hrs would be easier to accept.

I give up on MDs sometimes too and look for do it myself or alternative therapies.

I wonder if acupuncture or gentle expert chiropractic might be of help?
(The chiro I found was the most help for my TOS/RSI/myofascial pain syndromes)
He used many PT type modalities, my favorite were the IF stim & low level laser therapy. I have my own IF stim now as well as some other gadgets for home care.