Dr Hulk is missing an arm when Thanos comes to Earth, it would not have been a fair fight considering that Thanos took on hulk in a fist fight and won. Just if you see Hulk in that finale fight... his right arm is a singed mess, it completely swings limply and with no real power. It would have been his death tbh to engage Thanos.
Yeah, I guess the movie gave kind of a good excuse as to why he didn't fight. But I just wish they had gone a different route. Like, I don't know, maybe not having him lose his arm? I mean, in the comics he is supposed to have a healing factor almost as good as Wolverine's so..
I don't know, I just felt dissappointed. I felt the same way during the whole IW but I just gave that one a pass because I thought they were saving him for something epic on this movie. But nope..
Anyways, I guess it is what it is.