Saw this the other week, got a few thoughts on it.
Did good job of handling a large cast.
Storyline as a whole is contrived, pretty sure actually trying to kill either Iron Man or Cap is way too much of an overreaction for what's basically a disagreement that could easily be solved by those that want to sign it becoming govt agents and leaving the avengers to do their thing.
Specifically Zemo luring Cap/Bucky to whatever that was seemed like a fairly long shot to then have Iron man show up as well really pushed the suspension of disbelief.
Action was great, even though it was contrived the characters looked like they were out to hurt each other, humour was on point for marvel.
It was another family friendly entertaining movie, no real adult concepts were introduced there wasn't any emotional weight but it was a really great movie, enjoyed it a lot.