Personally I think it just didn't really gel with my vision of Superman.
Superman is a compassionate god living amongst men, he empathises and cares for us so much that he wants to help us and use his powers to alleviate all the problems that we have, which means rescuing people from floods, earthquakes, fires, getting cats from trees etc.
But he sees better than anyone that the main problems humanity faces are ones we create ourselves: War, Genocide, Crime, Greed, Racism, Slavery, Extortion, Hate, Murder.
He is a man of infinite physical strength, but his greatest fight is against the ideological selfishness ingrained in human society. A foe he cannot punch, or intimidate to change. His biggest nemesis is the very minds of the people he wants to save, and he cannot forcibly change it with all the strength in the universe.
All he can do is become a symbol. A symbol of hope, of goodness, of charity, righteousness, humility and kindness, to lead by example and try to drag us out of the mire we have trapped ourselves in.
And still he watches the world turn as it always did, and nothing new appears under the sun. The old Tyrants are overthrown by the freedom fighters, who use their freedom to become tyrants in their turn. The bullied goes out and becomes a bully. The rich and comfortable exploit and steal from those less fortunate to give themselves just a little more. The sun rises, and the sun sets, and nothing of humanity has changed.
I love the dilemma of Superman. He is a man desperately trying to save a world that is wilfully killing itself right before his very eyes, and the people that cry for help one day are the ones causing pain the next. You don't need a super powered villain to fight superman, you just need someone full of irrational hate, who refuses to change, who has no empathy or care for his fellow man. That man can just by his refusal to yield make Superman face the reality that maybe he is ultimately failing to change us. Maybe we are beyond help, and he is only prolonging the pain, because eventually he will die, he's invincible, but not immortal, and one day the world won't have Superman to save itself from itself, and on that day WE will destroy humanity: Not Zod, not Darkseid, not Doomsday, but our own selfish hate will doom us unless he can change our entire way of thinking, unless he can make all of humanity see that they don't need to fight each other, that empathy and care are the best way to live.
So far, he has failed to achieve this, and his biggest reminder is the constant gloating of the most unnecessarily selfish and hateful man of them all. Lex Luthor.
That's my Superman. That's what I want a Superman movie to explore. So far that hasn't happened yet.