As someone who never read the books I thought it had promise from the beginning. The parallel worlds, spirit animals, and sense of magic were interesting.
Unfortunately it was all downhill after that. They obviously tried to cram way too much into one movie leaving every single character superficial (and yet somehow strongly bonded to the MC) and every event rushed. It was just a bunch of questionable decisions and absurd action sequences that all turned out great. To top it off it ended without any resolution of the main plot.
Awful.