it makes sense, it's dramatic, and we can have a fight without power levels coming too much into play because almost everyone is pulling their punches.

most of the time, this would be a rout for team captain, but spiderman being a kid new to the game (and fanboying), banner and thor out of the picture, and t'challa operating with incorrect information meant the teams worked.

black widow's ambivalence is where all of them would be eventually except war machine. end of the day: they all know better than to believe the worldview the accord represents. tony wouldn't even have a team if romanov, rhodey, and vision weren't by their natures even more law and order than he is. (and it says a lot that other characters with statist backgrounds like sam, carter, and barton didn't even need to be convinced.)

but you can't control the variables (vision's shit laser luck). people don't have perfect information. and the people giving the orders (sec state and tony) aren't any less prone to passionate fuckups than the people they're supposed to keep in line.

mostly, tony is just obviously, once again, full of shit and working out his issues like a playground bully. motherfucker should have gone to that jail and put his ass in a cell at the end of the movie.