Snyder's Superman is mostly for people who don't like Superman

For years people have dismissed Superman as a boring character, so when Man Of Steel came along and made the character dark and brooding it created a safe place for people who rolled their eyes at comics Superman, Christopher Reeve, Smallville or The Animated Series.

Now Gunn's DCU has returned Superman back to his hopeful roots, has a portrayal that is more emotionally open and sincere that safety blanket is gone, Snyder bros and Gunn haters feel like they're losing the version of the character that validated their dislike for the character.