just like teachers, professors, friends, colleagues, politicians and so on, that we have all been subject to in our travels...
there is a person’s message or point, then, there is how they choose to deliver it
so many examples of horrendous, unpalatable styles of delivery chosen that totally turn off potential listeners, such that whatever merit the substance of the message may be becomes entirely moot
no one wants to be subjected to a heavy handed, argumentative, defensive blowhard