…and when you have some issues with how your younger self developed, stuff happens.
Consider David Foster Wallace as a professor of creative writing at Illinois State. From the recent bio:
In his undergraduate class, Wallace was kind to the clueless but cruel to anyone with pretensions. When a student claimed that her sentences were “pretty,” he scribbled lined from her manuscript on the blackboard and challenged, “Which of you thinks this is pretty? Is this pretty? And this?” He continued to battle any young man who reminded him of his younger self. When one student wowed his classmates with a voicy, ironic short story, he took him outside the classroom and told him he had “never witnessed a collective dick-sucking like that before.” Wallace promised to prevent the “erection of an ego-machine” and strafed the student with criticism for the rest of the semester.