[Peter scowls and looks away for a second--it had been him, sort of. His dad used him as a tool to hurt people.]

I broke free. Before.

There's no way this place is more powerful than the dude who had me. There's gotta be a way to fight it!

[Peter didn't mean it as an admission of arrogance, he didn't think he was any better than anyone else--he knew he was an idiot, but if he, an idiot, could bust free of a Celestial, then surely it was possible here too!

It had to be. Because he couldn't accept the alternative.]