David Leitch, Chad Stahelski, Darrin Prescott, and Spiro Razatos were the second unit directors on Civil War. The car chase was really good but the rest of the action sequences, I don't think you could see their hands on them. The airport scene used a lot of CGI, and that helps with the less cutting but the ground hand-to-hand falters. Remember, these guys went on to do John Wick 2, Baby Driver, Fast and Furious 8, and Atomic Blonde so they might not have helped on all of the stuff. There might have been a stricter shooting schedule so these stunt people can't choreograph or cut as elaborately as in those other films. It's a shame because Civil War had the best of the best but they might have been wasted by the Russos with the use of shaky cam and quick cuts around the actors. Like, let's compare a simple sequence such as Black Widow beating up some bad guys.
Here's the behind the scenes of Black Widow:
Here's the final result of Black Widow:
Here is Black Panther just doing one move on Bucky:
Rossatron did an action analysis of Civil War, and it's worth watching as to why he found it disappointing. He mentions those stunt people and how they might have been at the mercy of the directors. Who knows who was at fault. They could cut to wider shots and framed it so the choreography is clearer to distinguish, as suggestions for improvement.
https://www.youtube.com/watch?v=lP0sRFd52sQ
BTW I can't wait for Baby Driver which uses no CGI (and Atomic Blonde to an extent).