I've seen this happen with 2 of my friends. They had a very outspoken personality, and my school just did not dig this.
Both went on to get their BSN (instead of the diploma they were initially after) and became very good nurses.
I think nursing programs
tend to have the same problem nursing in general has -- it's tough, there's not enough support from "higher ups", and there is too much of the blame game. Instructors don't seem willing to "work with" people; any sign of trouble and pwittttt! out the door! In nursing it's the opposite re troublesome employees, the facilities keep them on til the employee dies, or a patient NEARLY does.
The instructor thing I've observed from the other end too. I was a staff nurse on a busy respiratory unit, and they had probably 6 students to one instructor. Not bad, if the instructor was THERE for them, I don't know why the school even BOTHERED to have the instructor there. The students were sink or swim. Us nurses tried very hard to help the students but basically our assignments were next to impossible WITHOUT them. So WITH them, we also had to take time out to teach, explain, answer questions --- SO unfair to the students, and difficult for the nurses. They probably come away thinking all nurses are b*tchy and don't care about each other. In real life, that is often what it looks like; we're so busy and strained with our OWN assignments, EVERYone drowns!