My interpretation (hurray for coming late to the party! I haven't posted in a month) is that he doesn't resent the superheroes for doing good, but for replacing him in the minds of the people--he doesn't mind that he was "saved" by a superhero, but is bothered that everybody considers him to be nothing more than a helpless bystander. Everyone is so starstruck that they don't even care what the explorers themselves did.