It was a good film, i wasnt a brilliant film and it wasnt a bad film, it was a good film. In its conception as a film, 20 years after the novel was written, it faced a massive problem. Mainly that the majority of the audience wouldnt have a fucking clue what the point of the film is/was and im guesing that you even missed a lot of it, same reason that i did, because im not in the context of the film so i cant understand the politics of fear that were present in the 80s which this was reflecting. Second to this was that the vast majority of the acting was god aweful. I mean it wasnt bad, it was aweful, the only character that was even slightly convincing was Rorschach.
Finally im guesing as you have only just seen it, you caught the directors cut, which apparently makes the film feel completely different to the cinema release.