I watched and loved this last year, so I'm watching it again now.
And, yeah - it's people dressed in ridiculous costumes pretending to have superpowers trying to be in a comic book (and have a movie, and be an action figure), so it's silly.
But it's not about the costumes or the fake powers or that sort of thing. It's about being heroic - which is really, and I think Stan Lee would agree with this phrasing - being a mench. Being a decent person - one who works with a team, who doesn't give up, one who cares about others - and acts on it. A person who does the task at hand instead showing off, but who is willing to stop to help someone else.
When one person - a police dectective calling himself The Defuser - sought out another contestent to give her strength and reassurance, that was being a hero. He's also a leader, and that's part of it, too.
It's ironic that Mr. Mitzvah was one of those who showed the least menchlechite - he's arrogant and stand-offish, and that's not a mench. He was in the bottom three according to Mr. Lee, and while I'm glad he stayed, it would have been fair for him to leave.
I like watching a show about being decent, you know?