This is my understanding:
Hulk And Banner Relationship
Despite the fact that there have been many incarnations of the hulk, the one thing that almost never changes is that hatred hulk and banner have for each other. The banner/Hulk relationship is a lot like the Dr. Jekyll's/Mr. Hyde's. it revolves around The good vs bad, Order vs Chaos concept, however, banner and the hulk has a far more intriguing connection in comparison to Dr. Jekyll/Mr. Hyde. The main difference is that Hulk is not a bad guy, he is not the villain, he is misunderstood, and in fact, when given the chance, he has done the right thing many numerous occasions . Hulks hatred for banner was manifested when banners mother died at that hand of their father, Brain Banner. Hulk acknowledges the fact that he and banner are one and the same, hence he blames banner for being weak and not being able to defend their dear "mommy", and as any kid would traditionally do, Hulk blames a part of the incident on himself, and so he takes his anger out on Bruce, same way his father did to him out of Fear. Their relationship can also be considered ironic, seeing as how a small frail intelligent man gets turned into a green behemoths who is potentially on of he strongest beings on earth. But there are more to banner that meats the eye, banner represents will, because he is charge of controlling a very powerful being. despite no being physically weak , banner the strongest when it comes to inner Strength of the mind, because even though banner had taken hell as a child and still managed to turn out relatively normal. Hulk on the other hand is not banners dark side (that would be devil hulk), he represents many aspects of Bruce, the traditional Savage hulk represents banners angry child self who was abused by his father, he is very strong due to the fact that most kids view themselves sometime as an unstoppable force , while the grey hulk represents the wild teenager banner never got to be. Banner and hulk have cooperated before, but no matter how hard they try the still seem to hate each other. Over the years banner has learned to use hulk sometimes as a weapon, in fact most recently, banner has joined shield because he has some unknown plans of his own, so instead of a gamma bomb, Hulk will be more like a targeted UMD. But Whatever happens to Them, in the end, their just two brothers who want the last piece of the cake, aka freedom.