Goyer works best on a team that can cover his weaker areas while helping his strengths. Which is totally fine; not everyone can ride solo. I think here the problems were not only his personal ability, but also his style of writing was a mismatch for Superman. The scene where Superman destroys the truck, for example. That was Goyer being funny, and for a character like Hulk or Namor, it would have landed. However, because it's Superman who we as an audience have certain expectations for, it came across as dickish and cruel to a lot of people.
Mind you, I don't think everything he wrote was awful. Like others have said, the movie had a lot of really good ideas. The scene where Clark's powers start activating in the class was legitimately good, and I like the scene in the pictures up thread.
Switching gears, on the inclusion of kryptonite, I could take or leave it. K has always been a dumb plot device (avoidable given the real world circumstances of its creation), and not having it would force writers to come up with other threats for Superman. I've been rewatcting TAS, and I love how many legitimate threats and creative situations the writers created rather than relying on K every week. Would like to see that transplanted in movies and games with Supes.
I have question for your comic book geeks.
Is there a comic were Superman goes nuts and kills people?
Quite a few. Most are pretty bad, though some manage to work it. Earth 2 is doing some nice things with it, right now.