My personal experience, which does not negate anyone else's:
Dr. Tracz is an incredibly hard working guy with high standards, and emotional immaturity. He had a quick temper and would get angry from time to time. One time to me he told me "I wish you'd stop being so goddamn lazy" after I did an assignment incorrectly in conducting class. I had done the assignment, just not in the correct way. It was my mistake, but come on, I misread one step. That being said, I never saw him cross a line to what I would consider abusive, however that's my experience and not everyone else's.