I haven't been doing it that long but I see some "animals" when I go kickboxing. Guys who are 17 stone plus and legs like baseball bats. One kick to the head and that chimp is going down. Of course you have to know what you're up against (as you describe, something with no morals).
I think it would be very foolish to think anyone could take on a chimp like that regardless of how big and strong you think they are. The thing ripped her hands off fo God's sake! I seriously doubt a human could do much more than badly dislocate the wrist.
I've seen the pictures of her from that show and it's really quite horrific, allbeit as tidy as the surgeons could make it.