I sometimes do wonder if some of the people complaining actually watched the film. Batman1115 for example, but then I think he is on some kind of wind up to be honest. Anyway, went for a second time last night so I could pick up on a few things that have been mentioned in here. Overall though I enjoyed it as much as the first time through. Its a good film and doesn't deserve some of the critic complaints. That doesn't mean it isn't without fault though, I'll put my thoughts down a little later.
I'll start with the scene in the Arctic regions. Lois was so clearly wearing cold weather gear when she was outside. No question. Also, why have so many people decided that it was -40 degrees? She was only told, 'be careful where you go at night as temperatures around here CAN REACH as low as minus 40...'. It wasn't a weather forecast. The sheer fact that she was outside means you can safely assume that she wasn't going to die of exposure. Besides it would have been a crap scene if she went outside, decided it was too cold and would go another night. This is a weak reason to slate a film anyway so enough from me on that.
I've also seen it asked how Clarke knew about the ship in the ice. The two army soldiers in the bar were talking about an object found whilst Clark was eavesdropping. 
The fights and destruction were, for me, in line with the strength of the characters that were causing it.  It's the first time I've seen a Superman film and felt that he is who he is. Thing is he was fighting against several others who were as strong as he is and who don't care about any collateral damage along the way. He's not really in a position to dictate matters. He just has to do what he can. Every person he saves (the soldier falling out of the chopper) means he is vulnerable to a counter attack.
The final fight with Zod was an impossible situation. Zod had lost the very reason for his being. His very programming was now useless as there were none of his people to protect. As he said, his soul had been taken. Superman was then fighting a super being hellbent of as much death and destruction as he could cause. He would never stop, until Kal-El was dead. It's pretty clearly stated. It had to end there and then one way or another, and the only way that could happen is by one or the other dying. Again, this is clearly stated. Superman was in no position to try to dictate the fight, even though on occasion he tried to take it elsewhere (punching Zod through the sky). Maybe there could have been a little more focus on Superman actually taking into consideration the damage around him, but to me that's all it could have been because of who he was fighting. At the end of the day Zod had tried to level the whole planet, so any destruction caused by them fighting was better than the end result should Zod have won. That part isn't my interpretation, it's clearly stated/shown during the film the consequences should Zod win with and without his machines.
My issues with the film are quite minor but stop this from being a great film in my eyes.
I'll start with the story. It was a good story but it felt crammed. There felt there was a lot not in it that could of, and probably should have been in it. The love story felt a little chucked in and rushed and a few things could have been explained a bit more. I really think that this film could easily have been an hour longer. The film was pretty much in two parts and it felt like he struggled to fit both parts in. It could have been two films, but with only one film scheduled he had to try get it all in. A difficult proposition, but it does affect the movie as a whole because so much was attempted to be accomplished.
My next complaint is regards to the score. I love the score, it another fantastic Zimmer production. But it was used far, far too much in the film. I felt at times like I was watching a film with music on the whole time. Music is supposed to add to scenes, not dominate them. And there are times when silence is more powerful. The scene when Superman is coming to terms with killing Zod for example. Just silence would have made that scene hit home a lot more than the music did. Silence, tears and the shocked look on Cavills face.
I will buy this on Blu Ray when it come out though and watch it with enjoyment. When this film hits home, it hits home as well as any other film I have seen. I really mean that. I welled up at least three times during the flashback scenes, especially the end when he is the little boy in the cape. Those moments are up there as some of the more emotional scenes ever. The little things that I mention above drag it down for me to a 7.5 out of 10 film.