What is Superman?

Batman v. Superman: Dawn of Justice opened up. I've become slightly obsessed with reactions to it. I have no intention of seeing it any time soon, but I can't help reading and watching how people feel about it. I went through a similar sort of obsession with Revenge of the Sith. Maybe the best reaction so far has been this article:

19 Real-Life Heroes who Remind us Why Superman still Matters.

But there are thousands of other responses, most of which are critical. Some people do like the movie. And it made a lot of money. So there's that. But what I've really taken away from everything on the internet about this movie--the title of which I refuse to type again--is that it's poorly constructed, poorly paced, and that the director/writers don't do much interesting with Superman. This stems, it seems, from a mistaken notion of what and who Superman is; Zack Snyder, people are saying, doesn't know what Superman means.

Most of the time, I don't like to dictate what a given story means (one of the qualities that gets a story into the Best Story in the World is its capacity for multiple interpretations), but I do think that there are limits to how far you can stretch any story or character from its center before it becomes something different. From what I've read about this movie, even the people who like it don't think it's a good portrayal of Superman.