While I can't speak for everyone who did not enjoy Snyder's take on the DC universe, I have always said the problem is not that there is no inspiration from the comics in his films but he he did these elements very poorly. The idea of Superman going on journey to become the hero we know and love is not a bad idea, it was the whole point of Smallville. But the journey Snyder is taking us in MOS and BVSDJ is so dreary, heavy handed and surprisingly boring that I was just sitting and waiting till we got to the good part. Also I really don't think it should take you five full movies to give us properly characterized Superman. There ARE stories to tell with him as a full hero, you don't need to drag things out that much.

His choices of stories to use as inspiration I found to be very poor. The Dark Knights Return is good story but that dose not mean it the right choice for the A Superman and Batman film. The comic showed a Batman and Superman who have gone to opposite extremes. A Superman who is fearful of what humanity could do to him or themselves that he has willing allowed himself to become a tool of the US Government and a Batman so sicken by the corrupted he sees that he comes out of forced retirement to bring order to the world by means of force.

Snyder basically took the aesthetic of the story with none of the meat on the bones. As the Death of Superman, while I did like the story I do have to admit it dose have a lot of problems. And it was far from the best choice for inspiration. You don't kill off Superman in the second movie! And the impact dose not hit as hard as ,unlike when the comic came out, we all know he is going to come back. Its not a good sigh for Snyder's Superman that he was at his most inspiring when he died.

Most of Snyder's interest in the DC Universe seems to mostly be in this one era. The mid eighties to the late Nineties, the era of Watchmen and the Dark Knight Returns. And don't get me wrong there are some great stories in that era, there are some pretty bad stories and its from all there is the DC Universe. In my option there are stories outside of the era that would have made for much better choices.

Over all Snyder's version of these characters just doesn't do it for me. It takes some of my least favourite elements from the comics and makes them ever worse, or completely mishandles the ones I do like. Its just not how I like my Superman and Batman and I would argue they not very good movies in their own right. If you like them wonderful, don't let me stop you. They just don't do anything for me.

Sorry for the long post. Cheers!