My worst college experience wasn’t even something that happened to me, but happened to a good friend. I lived in a suite with three other girls, and two of them were also my sorority sisters. One had some issues from a crappy family life, then found out her boyfriend was cheating on her (he gave her an STD). She tried to kill herself three times. She left school for a while and seemed to be doing a lot better, but then she was hit by a drunk driver, almost died, and ended up with memory problems from the trauma to her brain so she couldn’t finish school.
So that year (my junior year) pretty much sucked. Everything else about college was great.