If there is an even 1% chance he is our enemy . . . . blah blah blah blah flew out the window once he found out both their Mom's had the same oh so common name of Martha.
And Lex creates Doomsday to kill all the heroes but has 0 contingency plans if his plan actually worked.
Superman never uses his X Ray vision and stews while hundreds burn to death because he was all in his feelings and not looking for any threats.
Bruce Wayne's man in charge at the Wayne Enterprises building asks if he should leave while aliens tear down Metropolis.
No one knows who Superman is until you know they HAVE TO and then everyone knows and they always knew deep down.
Superman gives a speech to Lois before a final fight about dying KNOWING Doomsday is going to kill him and he wasn't going to try to survive. Isn't that called suicide?!
The movie tried to be deep but just came off really dumb.