That's the whole point. MOS was in many ways as dark as the Nolanverse movies. Superman shouldn't be as dark as the Bat-movies. He's a symbol of hope, not despair. That's Batman's thing.
And I'll have to disagree about Superman being boring. A man with his power learning NOT to become a dictator and stay connected to humanity is very interesting. If Superman used his power to rule humanity, that would be boring. Seeing how he doesn't makes his story an interesting one.
This ^