Likewise, a lot of drivers more or less don't give a damn and will practically run them over, or off the road, or door them.
Or do give a damn and do those things on purpose. Or will throw things at them. I've only had one or two cases in several years of daily commute cycling where I suspect a driver was maliciously trying to edge me off a road, but in some regions its apparently a frequent hazard, and if anyone brings it up, a lot of victim-blaming happens (e.g. cites story of a time they saw a crazy cyclist similar to yours, then claims the person being harassed by a motorist was probably doing something similarly bad, or attempts to charge the guy for inciting the incident in some fashion (see previous link)).
I try to call out cyclists behaving badly, but I find it isn't all that common. When I'm out and about I notice a lot of cyclists behaving perfectly well -- it's just that the odd one or two that don't are the ones that stick out and you notice. The same is true of any vehicle operator -- it's just that people have gotten so used to seeing several dozen traffic violations every day (e.g. failing to signal, running red lights or stop signs, improper turns, failing to leave appropriate space, various parking offenses) without even touching speeding (which would bring it up to likely some 95% of the traffic on the road -- people failing to exceed the speed limit are more likely to be noticed and considered out of place than people speeding). That one cyclist being crazy (and I agree they exist -- I've seen some pretty egregious cycling behavior before) sticks out more since cyclists in general are more rare, but I suspect fewer cyclists in total behave badly with regard to traffic safety (probably because of the inherent additional danger to cycling).