A complicated subject. People always reference Jerome Robbins but there was a seemingly long tradition of directors in the 50s and 60s who were known to be difficult. John Dexter and Alan Schneider to name two. They were mean. Cutting and sarcastic. I have worked for a few directors like that. They usually single out some young defenseless actor to heap withering scorn upon. Greg Boyd at the Alley Theatre in Houston was like that. They wouldn't dream of directing their contempt on their mature and confident stars. Only the ingenues or apprentices. Unfortunately, that behavior is not criminal. Just plain crummy.