lol, I was thinking the exact same thing. Hulk gets humiliated while Cap comes out of it looking ok. Though to be fair, the only real thing Thanos did to Cap was haymaker him, while with Hulk he hit him 5-6 times with some brutal haymakers and a knee. Hulk even had the Rich Franklin nose.
Though Cap came out of it still a badass and Hulk came out of it acting like a total coward. Frankly, it was a disgrace (to treat Hulk that way).
It's the same thing when Vision and Scarlet Witch were fighting the two badguys in Scotland. They are both super powerful (among the most powerful on the entire team), but they were getting their asses kicked. Then Cap, Window, and Falcon show up and defeat the baddies easily. Seriously, what in the actual fuck?!