You have to find a way to not think of it as behaving, but acting like the characters they’re meant to portray. If they weren’t comic book characters, literally two dimensional :), then it’d be different. Maybe live action superhero films just aren’t your jam?
I do like superhero movies—i.e. films about characters with supernatural powers—just not the MCU flavor of them.
I enjoyed Unbreakable, Chronicle, Birdman, Fast Color, Freaks, etc.