A lot of it has to do with expectations.
Audience expected the Christopher Reeve take on Superman, the classic Supes. And they got JMS' updated version from Superman Earth One. Who isn't as iconic, but is a far more interesting character when it comes to his personal development.
They expect Bale's take on Bats, they get Frank Miller's Batman from the Dark Knight Returns. Grim guy, scary as hell. Someone who is willing to take life when called to it. Several of the scenes were right out of DKR.
Wonder woman, we just don't know. But she's the one character that's just having fun, and it shows. She's going to be a massive hit in the next movie - and that will redefine everything, because Marvel hasn't embraced female superheros nearly as much as they should. The Wasp will be cool when we finally get her. WW has the potential to be a phenomenon.
As far as the rest, I do personally think most audience members aren't up to following all the nuggets Snyder drops. And that could be a problem for the film. This film isn't as fun as the Avengers. But what it sets up to do it does extremely well. I truly hope Snyder gets a chance to finish his vision for Supes. Because when the icon arrives, it will MEAN something in a way that no previous version on the screen ever did.
Good points.
Here's my take (for whatever 5 Canadian cents is worth--no more pennies):
Your point about "the classic Supes" is spot on. In the vast majority of critical reviews and comments, the thing that comes out most is "that's NOT Superman". Well, "that's NOT Superman" is exactly what I like about the Snyder films.
1) In this version, baby Kal-El arrives around 1980. He grows up in a post-Watergate, more cynical and distrustful world. His adoptive parents are not Ward and June Cleaver on the farm. They don't have all the answers and they're not perfect--just like real parents. So Clark doesn't get an "ideal middle America" upbringing. He gets a more believable, imperfect one. No 8 year old Superboy out rescuing cats and blowing out fires on Henderson's farm or some such thing. Keeping his powers hidden is, by far, the most natural precaution his adoptive parents display (and if they were fans of the X-Files in the 1990s, they'd certainly not want him to be "on display"). So no "Truth, Justice and the American Way" default position. And that makes him a much more interesting character.
2) He still has some decency and moral grounding--else he wouldn't bother helping people as we see throughout his pre-"coming out party". But having grown up in a more cynical era (one not unfounded), and having had little, if any guidance about his alien heritage, he's understandably reluctant to be more open. Again, a conflicted character is more interesting than one who is entirely comfortable in his skin from day one.
3) His search for answers eventually leads him to discovering the colony ship and learning quite a bit about who he is and where he's from. But such information cannot have been easy to process and assimilate. Still, he eventually embraces what he can of his heritage. But oops, he's also unknowingly signaled a hostile force about the location of his adoptive home.
4) He makes numerous efforts at helping fend off the hostiles--yes he's conflicted about how best to respond to their message (again, a more interesting character), but he makes the "right choice" in the end. And I thoroughly enjoyed the "alien invasion/first contact" approach to telling the Superman story.
5) The battle is fierce and the damages extensive--as should be expected with the kinds of power levels on display. He's also alone against a number of people with the same abilities and trained for combat (on what is effectively his FIRST DAY ON THE JOB as a superhero). Of course he makes mistakes.
6) The new movie raises a number of interesting themes--how do we (as a society/species) cope with A) the existence of extra-terrestials and B) extra-terrestrials with such power. Of course he's worshiped by some and feared by others. Anyone imagining that, in 2016, the world would react to Superman the way the 1978 film suggests has a poor understanding of current social dynamics (and, arguably, the 1970s version was WAY too optimistic).
I have more ideas, but I'm out time.
Basically, I find the reaction to Snyder's Superman parallels the reaction to Abrams' Kirk--each is shown to us as imperfect rookies (and then lightly experienced in their roles), and those who expected the fully formed, mature version of the character--the one they imagine makes no silly mistakes and so on, and the one who behaves exactly as they think they are owed/expect--are naturally disappointed. That's fine. No one is required to like a movie (or any other work of creative expression). But expectations certainly play a key role. I, for one, would rather watch someone attempt a different interpretation and risk not pleasing everyone (or even a majority) than watch a re-hash of an interpretation for which there are, literally, thousands of examples in print and on screen (big and small). YMMV
They're not perfect or flawless movies. I gave neither full marks in the polls. There are pacing issues, editing, clunky transitions, ideas raised that lacked follow through--but the decision to give us something that is "NOT the Superman I grew up with" is something I applaud, not dislike.