A-
Give it a chance.
Rochester is a hidden gem. True, it's not a metropolitan city but it's not an abandoned town either (sort of). You have to be pretty explorative to find some stuff, but there really is some nice things here. There are pubs and clubs down at Alexander Street, a neat little art scene, some awesome indie bands play here (avicii, anyone?) and the restaurants are awesome. It's pretty much a hipster's dream. But if you want to go anywhere, you need a car. Or plan accordingly with the shuttles and a map.
If you're adventurous enough, you could always drive out to a campground for a weekend with friends by the lakes, or go to the beach if it's in season.
During breaks, you could always go to Toronto and NYC, not that far away either.
And even if the city starts to turn creepy, going back to U of R always feels better.
People tend to complain a lot because they're so absorbed by the U of R bubble. If you broke away and actually got out and looked around, you might be able to see some cool stuff. I'm a freshman, and I've seen a lot of awesome things already. Though, I admit transportation is a bit of an issue.