No big surprises there.
The problem, as always, is volume production and Australia's relatively small population. The most viable car production plants around the world do volume runs in the hundreds of thousands of vehicles per year. The domestic market in Australia can't generate enough demand for all those vehicles, therefore Australian production must be geared to export a significant chunk of production. Ford decided against this, instead of going down the road of producing a left-hand drive Falcon for export they developed the Territory SUV for the domestic market. Turns out to have been the wrong strategic choice.
Or
Our minimum wage is double that of Germany and UK, we allow unions far to much power and we have dumped huge overheads on businesses around compliance, Ohs yadda yadda