Sweet jesus on roller skates, here's what you're not following even a little once place in a proper lock you would have to either A dislocate your body or B break your joint in two to get out. Now the problem with this is A can't work because the hulk's own body would keep getting stronger so he couldn't dislocate his joints as his own strenght would work against him in that manner and B can't work because no body (even super duper strong ones) cannot CANNOT break a joint with reverse motion on it's own (you need to use your other arm to accomplish this). Now here's the kicker, it DOESN'T matter how strong you are, in this instance the stronger you are the LESS you can do in those situations. The more dense your muscle the less chance you can accomplish option A (the only one that would help). Now I know the hulk has magic strength that can do anything, I'm just talking about fight machanics, logic and common sense. Herc's vast experience in one of the most effective possible martial arts against a stronger opponent would have him owning hulk (who has no fight training or ability whatsoever, and please don't mention his "fight" style which consists of clapping his hands, stomping his feat or any other small baby temper tantrum motions which some think make up a style) each and every time.
The people you're talking about breaking holds either do it before the lock is completed, are breaking an imperfect or sloppy lock or have the leverage to do so. My thought would be herc the guy with more experience than anyone on earth with grappling by over a thousand years would be a little better than anyone we've ever seen in MMA (which is a joke now).