I had so many questions after watching it, why was Superman on trial if the terrorists were killed by bullets? How could he hear Lois was in distress across continents, but can't hear a bomb ticking in the same room? How is he such a morally ambiguous monster that one bad day away he could turn into a horrible tyrant? It's the Dawn of the Justice League, how come Superman and Wonder Woman, Clark and Diana, best of best friends, not say a single word to each other?
The answer to all of the above, and more, is bad directing/script writing. It has it's cool looking moments, but as a movie it's probably one of the worst I've seen in a while.