Plus it's boring. It's the first Thor movie if you replace Jane with Lois Lane.
People need conflict to build interest. That can achieve one of two way, 1) Chacter overcoming his personal flaws to succeed(Supes has no flaws) 2) Character overcoming the odds to succeed (Supes is never the underdog. he's too invincible).
So what do they do? They find some Kryptonite over and over again to make him weak temporarily.
Solution? In my opinion it's easy. Keep his power at 100% all the time no more Kryptonite cheese(We want to see SUPERman not REGULARman)
Give him a more complex personality WITH flaws. Like Maybe he's not too bright, or Maybe he's a bit naive, Maybe he has anger issues, etc
Too often we get this invincible saint.