Not sure the mountain troll deserved the Meshuggah-lite soundtrack, he didn’t really live up to his hype.
It’s writing by spreadsheet, but that’s what they’re bound to. Introduce anything non-canon and people complain, stick rigidly to the template and people call it predictable. There’s far worse writing in current film and tv, excepting the now standard “people travelling vast distances across an epic landscape seem to bump into one another surprisingly often” as perfected in the dragons and boobs show. A decent cover version of the original Peter Jackson films.