It's been my experience that we don't hate people with EEs, we come to hate people who have EEs and therefore think they know everything. New EEs are, as expected, the worst, because they don't know how much they don't know. I'd say about five years in they have a much better grasp of how much there is to know and how much the "technicians," or worse yet "line assembly personnel," know that school never teaches an EE.

My dad was an engineer and had just short of contempt for technicians. (He also thought techs and mechanics should clean up and put away tools from the day's work AFTER they clocked out! That's outrageous!) It's almost as though not being able to do the math is seen by some as inability to comprehend.

It's irritating, too, that the previous owner found the installer unresponsive. That installer sounds like a jerk.