I thought it was horrible. The first two movies were great, but this, this was a piece of crap. Sandman wasn't presented in a very interesting way. What was with the whole I'll team up with Venom to kill Spider-man and then at the end it turns out I'm actually a perfectly good guy and the murder was an accident? In the other movies the baddies always turn bad because something happened to them, and by the end they're "cured" or whatnot. But with sandman, nothing happened, it just didn't work.
and speaking as someone who knows nothing about spider-man except from the first 2 movies and the old tv series from decades ago, what was with venom? Based on what I saw, he was an awful enemy. Maybe I'd like it a bit more if I actually knew some of his backstory from the comics.
emo spiderman? That was just dumb. Did they really need to give that so much screentime? Like the whole jazz bar scene, it contributes nothing to the movie but disappointment, and the feeling that I just wasted $8.
The action scenes didn't redeem anything either. They were decent, but not as good as the ones in the other movies, and just too short.