Binge watched.
It was a delightful family adventure with wholesome characters tinged with stuff that I associate with del Toro. The trolls are macabre and consistently alien, with their dietary habits and their threats that manage to be creatively violently PG. The evil troll in particular delivers colorful language about eating and flaying his foes. The troll market is like a brighter, more colorful version of the demon world from Hellboy. Lots of slapstick humor which feels inventive due to the size difference between the humans and trolls.
Can't say I really bought the character shifts though. I mean, they were properly foreshadowed and all but just felt like they needed the character to get to a certain emotional spot but the shift ends up jarringly drastic. The personal feud between the main character and the villain gives the animosity more omph with each encounter, including a delightfully menacing dinner spar with a verbal match where the characters show a fun genre savvy in escalating, "I was clever enough to anticipate your next action" banter. I didn't feel the core basis of the relationship but the scenes that result from setting up that relationship were fast and cutely witty.
Character relationships seem to grow in parallel and the unveiling of the troll history, as individuals and as a race, provides great texture. It's fun fantasy war popcorn.
Overall, the troll angle is what makes it likable. The fantasy rules and stakes are clearly explained, even with the bizarre setting.