They didn’t explore the psychological side of it enough. Or maybe they didn’t explore it in the right way. I really like movies that have some type of psychological element to them, things that mess with your head or mess with the characters heads. This movie didn’t really do that. Yes, the characters were paranoid and that came across, but I think it could have been delved into deeper than it was.
Bug also had some weird camera shots, and randomly interspersed pictures of bugs and stuff that didn’t really fit with the film. The other characters also didn’t have much of a purpose at all, and I would have liked to have known more about them. As I said, overall this film was a disappointment and not what I expected at all.