Easily the worst decision I have seen in MMA, boxing or any combat sport.
Granted, boxing is a lot more difficult to score because it's over 12 rounds and a lot more technical, but still, that one was easy to score. Certainly more east than any MMA match that was deemed controversial.
As for what Dana will say, probably something like, "Bro, boxing is corrupt and dying. Buy UFC branded stuff." and then the fans do.