I don't think that all things manufactured in Australia are garbage. Out of twenty one million Australians, I am sure at least one Australian is producing something of quality in their home-country (Australia).
Our mineral resources are no longer as popular as they once were because other countries are producing them cheap, and the world is becoming less reliant on coal and oil products.
We don't have a single good media studio, with exception to the guys who created The LEGO Movie (which is still technically an American film).
Most of our products are Chinese rip-offs or American imports. Many Australian-made products are either inferior quality, or only have a digital market-place because the giant store chains won't sell their products.