Have humans ever won a battle, or a skirmish, against big blue? I'm fine with having the natives win but don't enjoy it when you just rehash fight scenes from the first movie as if humans never learned a thing.

The 'sky people (us)' return after some number of years and proceed to make the same mistakes over again. The most annoying one is that our hovercraft, potentially a great weapon, is worse than useless. All Blue has to do is throw a spear or arrow through the glass canopy and it will either hit another valuable asset or explode on impact. I get it, team blue is really strong so their spears and arrows have more force but still, all we have to do is make the canopy a bit stronger and we get to use our hovercraft again. We already have plexiglass that can stop bullets from an AK-47 at point blank range, can't we improve on that?

Instead of making arrow proof glass, they do form a new infiltration squad but they end up being useless canon fodder.

In short, 3 hrs of tedious, repetitive action.