Maybe it is just a difference of perspective. I thought the game was fairly good to Hades, and when you beat it the first time you learn that Hades was right to say you cant go to the surface. And while he does eventually change his mind (yes, after being humbled in defeat), he is still the only one of the gods that cares about you, as the Olympians see you as merely a pawn even after you beat the game.

I also dont think I would count Persephone having sway over him, since she can do that even in the actual lore of Greek mythology.