Ever since the Death Battle all I've heard is people whinge and bitch about how Superman is "so OP".
He's really not that powerful in terms of fictional power hierarchy. Right off the bat I can think of someone who can take him; Thor. Yup that's right. The underrated demigod who is probably the most powerful member on the Avengers. There's plenty others that I can list too.
I understand that the majority of the complainers are butthurt DBZ fans, but this is getting ridiculous. Go ahead and immerse yourself in other fictional universes/stories, and you'd realise he's actually pretty mid tier.
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As for Thor, Superman kicked his ass in the JLA/Avengers cross over Though you're right, I find it's mainly the people who don't know a thing about Superman who insult him, his stories and his "OPness"