It's true though. There's nothing wrong with placing a hero's most defining character moment at the end of the film.
Hell Frodo's moment came in the last *five minutes* of the 3 hour FOTR when he was standing on the riverbank holding the Ring.
I'm not saying that BvS was above reproach or anything but it's biggest shortcomings were not its lack of character arcs (especially in the case of Batman.)
And he completely misunderstood the ending of Suicide Squad. Deadshot's daughter didn't "want" him to put down his gun, that was a planted vision by Enchantress to try and prevent him from killing her!
In the context of the film it was actually a pretty well done arc that played out organically based on what happened before and what Enchantress was capable of.