Indeed. Perhaps the poster has had a bit of a run-in with him?
Those who I know who are on first name terms with him say that he is very strong willed, and a bit of a "big beast" - but not unpleasant or a bully as a person. It's just that at work - it's his way, or the highway. If you screw up by trying your best then he's fine. If you screw up by being a numpty then you get the hairdryer.
That's not what most drivers say about him. Allegedly, Head is/was very opinionated about setups and would routinely ignore driver's preferences because 'he' knew best. According to the stories about him, Head got along best with Jones, also an abrasive personality.
It took either an established champion like Piquet or a driver who wasn't easily impressed like Keke Rosberg or Villeneuve to overrule him and go their own way.
People like Laffite and Frentzen all have had their differences with Head. And all were succesful with other teams which did listen to them. In that regard, he seems more like an office bully. How can you try your best if Head decides how you are allowed to show your best?