So my cousin and I had a good conversation about this movie today. He's been a comic purist for a long time and I through him for a loop today and he agreed with me.
Most don't like when a character, such as Superman is not like the other movies. I explained to him that even the comic books every 10 years or so they change the characters to fit the times. Hell, Surperman had a mullet and had a black uniform. He then said, but this Superman killed Zod, that's not Superman! I then asked him, has Superman killed in the comic books before? He started to laugh, and said, "You know what? He did?" "I guess I just have this perception of Superman that I want or like!"
And he made my point to those who complain that it's not my Superman. It never was, Throughout the decades, Superman has always changed in the comic books. People just want their Superman from "Their" era.