My experience after having grown up in America, living in Germany 7 years, and then living almost a year in Australia, is that all those you write might be completely true, but even then, Australia is actually behind the United States in all the things you mentioned. Other than everything being redonk expensive, it's a Anglosphere paradise compared to the United States.
The US is decades ahead of Australia in terms of its descent into a corporate-owned shitshow.
Where did the US enter into the conversation, other than as an attempted distraction from the points the parent was making specifically about Australia? The parent never mentioned the US. The linked story is also not about the US.
Apparently North Korea is terrible compared to Australia. And yet the parent's comment was also not about North Korea and nor is the linked article. We could run the gamut on countries, there are another hundred plus after North Korea that are not great places to live compared to the affluent top.
The US is decades ahead of Australia in terms of its descent into a corporate-owned shitshow.