Good points. Someone mentioned the mentality aspect and I agree. I'll take it a bit further and say due to his religious beliefs "gods will" and all maybe when he lost it shook his faith or his belief in being God's warrior.
The game plan he had wasn't good at all but come to think of it, he does always go in with the same game plan. Brawling with Dan at the start of the first round is suicide, everyone knows that. You have to tire Hendo first.
"Let them see that their words can cut you, and you'll never be free of the mockery. If they want to give you a name, take it, make it your own. Then they can't hurt you with it anymore." - Tyrion Lannister