"I'm stuck here for the same reasons as the rest of you."

He's not even going to dignify Iman's childish gestures and eye-rolling with a response.

"Except that I wasn't blindly hopping around to other universes; I was pulled into this one. And if I wasn't at a fraction of my true glory, I wouldn't be having this conversation with you."

He would have been out of there faster than you could say 'Sam Winchester'. Instead, all the inhabitants of Manhattan are stuck with a disgruntled, slightly intoxicated Satan who's recently received some very upsetting news about his family. It is not an ideal situation for anyone involved.