I consider the worst part of my school to be the lack of concentration in certain fields of study. Some fields of interest to me only have one or two classes in which to enroll and study in. I consider this a problem when someone has a major field of study that their beginning college doesn't fully support, which an example in my case would be Sociology. When I transfer to a 4-year university I'll only have taken one class in that field thus far.
I consider the worst thing would have to be not having a place on campus to eat. Not every student has the ability to leave campus to get food. They may not have a vehicle or they may just have a small break between classes. A student may also not want to leave campus one day to get food so a place to eat on campus would benefit them.