Well early on, Stark was smug about doing the right thing.
Which is permissible.
Later when it was pretty clear that he was wrong, he still thought he was right, and was just as smug about it.
Which is delusional.
Captain America was just about as equally tunnel visioned.
Attacking S.H.I.E.L.D. and Iron Man in defense of his point was stupid.
Take and hold the White House.
What contingencies does the secret service have for when the Avengers go bad?
Which again is stupid.
In the dead of night, while they're sleeping, you replace or brain wash most to all of congress to control the vote on everything to put the world right overturning the Superpowers Registration Act and castrate Tony Stark.
Which is just about nothing compared to the universal rape they used to give Spider-Man back his secret identity.