It doesn't have to be one or the other.
Yes, Iowa got out hustled and out toughed.
Yes, the officials were terrible. When CJ Frederick gets shoved early in the game resulting in him clearly double dribbling, the ref can either call a foul or call a double dribble. Calling neither is an abdication of the job of officiating. They set the tome early. It did not favor either team specifically but it favored a style, which is aggressive, physical defense. By the way, the style that is the exact opposite of the "freedom of movement" that is claimed to be what they are officiating to.
So, if the officials are supposed to determine the rules of basketball on a game by game basis, they were fine. If they are supposed to have some consistency implementing the rules as dictated to them, they were terrible.