I've never seen you ride so I can't comment but I do wonder how many incidents are caused by cyclists' riding style and road position. I guess it's easy for me to pontificate because I only ride in a reasonably moneyed rural area, the
Ribble Valley and Bowland Fells, where drivers are accustomed to cyclists, usually drive decent cars, are often out for a day's sightseeing and usually treat us with care. It's noticeable that the closes passes and rude gestures mostly come from beaten-up vans or chavved up economy hatches being driven too fast. But having been a motorcyclist for 12 years I ride my bike in a manner that asserts my right to road space and that includes riding with respect to car drivers, i.e. make myself visible, assert my position but make it clear I've seen them and am aware of my slower speed. This means acknowledging their presence and singling out or moving over to allow them to pass when it's safe for me and my pals. I always thank drivers who have waited patiently and most pass wide with a pip or a wave. Nothing infuriates a driver more than a cyclist or slow-moving vehicle who makes no effort to allow them past.
However if you have no choice but to ride on busy A and B roads that are used as commuter rat-runs I guess you are seeing drivers at their most stressed and distracted.