Some refs make bad calls, but it is a bad look and doesn't belong in the game of CFB. I think some initial frustration is fine, but screaming at the ref for 2 straight minutes deserves at the least a 15 yard penalty. I don't care if the coach is right, that is an ugly look. Seek to understand, express your frustration and then move on. Constant screaming at the ref should not be tolerated.