I do hope this gets some traction. Bullying is, indeed, endemic to the entertainment industry. I witnessed a very well known Broadway director screaming at multiple people on the Creative team, always men. I asked around and found that this person would never be abusive to leading or featured actors, only to "lesser" creatives - and I chose the word "lesser" carefully - and people in the ensemble. The director's reputation around NYC was as a "screamer." I can't say who the director is as they have been known to bad-mouth and lie about people they think have crossed them and have tried to "blacklist" them from working in NYC. Not worth the risk.
Just after witnessing this, I heard a wonderful phrase from a Grip on a film:
"being an insufferable megalomanic is by no ways a prerequisite to making great films."