Its said he hated the role because he was typecast and couldn't get other work. He died under mysterious circumstances. Its said his house is haunted by his ghost in his Superman outfit, making that an ironic hell for his spirit if that's true.
Maybe he lives longer and happier and finds something more serious as an actor he'd be OK with.
Kirk Alyn who play Superman in the Movie Serials was offered the role on Television a couple of times but turn it down.
He already had problems finding work after playing Superman.
He did not want to be typecast.