I can only speak on my experience as both a previously passionate cyclist and passionate car driver in central Europe. There are very real issues with cyclists here but they are mostly centered around large cities where for reasons no one understands, cyclists both seem to believe that they are the untouchable on the roads and that there is no need for taking care of themselves and others. You can see the most insane behavior on European roads performed by cyclists. The famous switching to the sidewalk to skip a red light while then getting both pedestrians and cars in serious danger.
Here on the European country side especially in a mountainous place like where I am, there are mainly two problems, road cyclists that ignore the perfectly prepared tarred cycle roads and mountain bike people who shoot out of dirt roads right onto streets without any care.
I strongly advocate for mandatory license plates for any bicycle on the road, it would finally give the public a possibility to get the bad actors of their bicycles and keep the roads save.
If the situation in Down under is similar, I can fully understand the rage and it has nothing to do with our cyclist cloths.