Not a man.
What kind if man beats up a woman?
The lowest of the low.
What? You don't believe in female equality? She demanded the chance to fight a guy. She got her wish.
The Marine did her a big favor in granting her wish in a controlled environment. She sounds like the kind of fool who would have gone off and issued her challenge in some bar, and encountered some guy who was willing to give her her wish WITHOUT gloves. And she would be dead or permanently brain damaged.