Are you in highschool??? And are you honestly hear on the boards telling me about being in highschool?
Obviously Sandman wasn't as sympathetic has he could have been, but I am sure your 800 person class didn't want to sit through the non-Venom filled non-action scenes where he goes to a doctor seeking help, etc. since it well wasn't filled with Venom in every moment. Raimi's cut was 156 minutes approx. and what we got was about 139ish.... (since I am too lazy to look it up). Lots of little things were trimmed but it's clear whole sections of Sandman were cut.
As far chessiness is concerned, did you see the other two films... Rain drops keep falling on my head montage scene for example... there she is mary jane, oh boy... that's part of what makes these films as memorable as they are. There is a certain level of humor and a certain level of action, drama and character development that must be balance.
In this film the character development was summed up too quickly for Sandman, who lost most of his scenes at the request of Sony to beef the film but, but they'll surfice again. None of this is groudns to hate the film though.