The eyebrows only move up or down. They don't curl up. Completely unrealistic and lack of animation.
are you trying to be willfully ignorant
I don't even understand how "completely unrealistic" is a complaint, it's a loving cartoony movie
and "lack of animation"?? ...you could say LEGO have a "lack of animation" because it's LEGO, so they're clunky and blocky even if you bend them a little
also are eyebrows the only thing that define a facial expression?
but aside from that, the eyebrows actually do curl a little... in fact I wasn't even aware a human eyebrow curls that much anyways