Yeah, he's not mad about the rule, he's more mad at himself for letting his team down. They had a small shot at a national championship and were looking to get a 1 seed in the tourney but the first game they played without him they got worked against a mediocre team.
BYU did the same thing to their star RB a couple years ago for knocking up his fiance. He ended up jumping to the NFL supplemental draft.