Yog Sothoth said
have you read a superman comic? because this post is full of the classic myths about Superman being OP. Marvel has Sentry and Silver Surfer who are insanely powerful with not as many weaknesses. Superman is weak against kryptonite, he also has no defenses against magic and he loses his powers under red sunlight, Superman is one of the greatest comic book characters of all time
Myths? Oh no, Superman is completely fricking OP. His weaknesses don't mean jack shit honestly. Kryptonite is a really rare element to get a hold of, so the chances of it being used against him are pretty low unless you're Lex Luthor or Bruce Wayne. A Red Sun? Sure, let me just lasso one of those from a galaxy a couple of light years away and bring it to where Superman is! Or maybe try and lead Superman to it without getting captured by his superspeed or him seeing it miles and miles away with his superhuman vision.
And magic? Yeah okay, maybe, assuming the Superman isn't running or flying around at the speed of sound and dodging the spells. You mentioned the same thing in a Harry Potter RP we were in one time. I also remember him getting struck several times by Shazam's lightning bolt and still having enough strength to overpower him.
He is easily capable of destroying anything with a well placed punch, and coupled with the speed he's capable of going at... yeah no, goodnight for whatevers on the receiving end of that. His invulnerability is complete bull too unless you're Doomsday, and if you want to compare him to Marvel characters, Sentry wouldn't do crap to Superman. In that movie you have in your signature, Superman vs The Elite, one of the villains said that Superman was on the receiving end of the force and energy of 15 (maybe a bit more or less, but somewhere around there) exploding suns. I'm no physicist, but I know that's a hell of a lot of energy for anything that's not a god to survive.
And the sad thing was that he wasn't even scratched. Ok, maybe he was, but his wounds are pretty much scrapes and bruises and nothing really serious. Oh yeah, "instant lobotomy".
Superman might be an inspiration for many superheroes and comic books, but to say he's not OP sounds more like turning a blind eye to significant facts. I used to like Superman and I honestly still kind of do, but he seriously needs to get nerfed some.