I would never buy a car built by these overpaid idiots when I could get a japanese or south korean car.
My guess however is that the stereotype represents a shrinking proportion of actual Aussie males, though they're still there. We all have our own selection bias of course, but in my experience young Australian men are a pretty big improvement on their bald barrel-shaped shock-jock-addled beer-guzzling 4WDing [poofter/boong/woman/asian/tree/whatever]-hating coal-loving fathers who so despoil the Australian suburban landscape.
Don't believe me? Many Australian men are two inches away from overt racism on one side, and super-duper-liberal-moral-high-grounder on the other.
That said, Australians are generally very kind and fun. But hard work and struggle builds both character and moral fortitude, and the typical Australian male is without either: They're gfted a generous opportunity, chilling out on the doll, or pushing papers in some uncompetitive bureaucracy.
I used to have several Australian coworkers who were generally quite pleasant and easy to work with, but several of them had an attitude and their interaction with dark skinned individuals was shocking. Having overheard them arguing with another Australian coworker about the case of the "abo gal fucked to death", I'm not surprised by your description using the terms "overt racism on one side, and super-duper-liberal-moral-high-grounder on the other". Their conversation was peppered with racist stereotypes, going as far as to blame the victim as being an "abo whore". I found out later that the victim was Lynette Daley, a young aboriginal woman who had been drugged and then, shockingly, literally, raped to death "blunt force genital tract trauma". There was little to no coverage of this here, but it does seem to have attracted at least a little attention in Australia. http://www.abc.net.au/news/2016-05-09/nsw-dpp-under-scrutiny...
We also sort of have this kind of dichotomy in America. As a matter of public policy, our wars and policies unfairly target Muslims while we preach that any and all discrimination is illegal and intolerable. I like how the South Park creators put it: https://i.redd.it/bbwo4ropuesz.jpg
I did see it in Netherlands though. I also worked for a few years in Netherlands, and I was shocked to see a woman, one of the management / HR mock the only black employee relentlessly with monkey noises.