This is honestly why I ditched DC years ago.
The problem with Superman isn’t his backstory, or motivation, it’s his out of control power set. It’s the same problem I have with “god of prep” Batman.
I like rooting for the scrappy underdog, or at least a hero who can be hurt. Kal-El…can’t. At least, he can’t be hurt without employing his well-known Achilles heel, so there’s never a question with Superman as to whether he’s going to be at real risk. The worst he can do is lose, so you have to threaten other people for there to be stakes. But Kal-El isnt just invulnerable - he’s also super strong, super fast, and has a dozen other powers. Clark is the original “Gary Stu.” So is Bruce, for the record, but we can at least suspend disbelief and accept that he could be killed. He won’t be, but he could be.
But that’s why some people prefer Superman to Batman. Me? I’m a Sider-Man/Captain America/Hawkeye/X-Men guy.