It's useless man, you just don't like the character!
No amount of arguments will ever make you like him
But let's see if we can agree on something... forget that this is Superman, imagine somebody invented a character nowadays with those superpowers, and take another look.
So we have a kid who is bullied by his classmates and who has the most horrifying experiences happening to him, things he doesn't understand and can't quite control (like seeing the insides of his classmates). His classmates call him freak and make fun of him. When those very same classmates are in mortal danger, he risks everything to save them. His father does what every parent would do, he tells him "screw your classmates, save yourself, I don't want to lose you". So he grows up with this conflict of knowing he's different, that he probably doesn't even belong here, he witnesses his father make the ultimate sacrifice to protect him, and every time he saves people he is confronted with the same mix of awe and fear.
When he finally discovers who he is, he accepts and embraces the role he has to play, and once again risks everything, and gives up everything in order to fulfil his role on his adopted planet, the planet his parents taught him to love.
First his mother almost dies simply because of who he is. Then his crush is threatened. Then the entire freaking planet! And every time he rises to the challenge and does everything in his power to save people: first his mom, then his crush and then the whole world.
(And I call BS on that "oh but he destroyed Smallville, he destroyed Metropolis!" crap. He is literally fighting to save his life. For the first time in his life. For the first time against beings as powerful as himself. Have any of you been in an actual fight? I have, and if you can steer the fight away from
anything when somebody is coming in to kick your butt, you have my endless admiration...)
That a great story, that's a great character. And a very believable one. And yes, he does come off as hopeful and positive, because he does do the right thing.
And then we get to the second act. We witness how he has been doing the right thing all the time. But we also see how people react to him: some see him as a god, others as a threat, and he is neither, and he has to confront that, and come to terms with it and try to make the best he can out of it. He has this immense power, but he's not comfortable with it yet, he still has to find his way, even though he has been doing the right thing and helping selflessly everywhere he can. Even as a journalist.
I see a great character in that. A believable person trying to figure out things that no man has had to figure out.
Would you agree that that is an interesting and believable character?