To the OP: Just FYI: Saying that Audi drivers do this or BMW drivers do that, is simply not true, because all drivers of those vehicles do NOT behave in whatever manner it is that you object to.
This is something called "confirmation bias" in safety and risk assessments: in your case you only notice drivers of particular vehicles doing something wrong because you are in some way overly sensitive to, or concentrate disproportionately on those vehicle types, to the exclusion of others. This could be owing to a prejudice of some sort.
If you take a moment to think about it, this attitude is similar to racism: you are assuming certain traits or behaviours based purely on what a person, or in this case, a vehicle, looks like.
In recent months while driving, I have personally witnessed - or had to brake to avoid - mistakes or bad driving by drivers of Nissans and Mazdas as it happens: Both mistakes that were nothing to do with those particular makes of car. In addition I was tailgated much too close yesterday; once by a van, another time by a pick-up truck, but I don't know what make they were, as I could only see their headlights.
Oh, and the driver of a small Ford something managed to drive forwards straight through the wall at the local supermarket, instead of reversing out of the space..........