Do I read into your rant that had we developed since 1788 with...

Do I read into your rant that had we developed since 1788 with only a single government and, in due course, lots of municipal councils that we would be a better place?
That we wouldn’t have relied on imported capital to develop the country – with that imported capital thereby acquiring “resource companies” etc.

Or should our nation of what was 7m in 1945 have tried to bootstrap ourselves with our puny financial resources and resisting overseas investments. In what shape do you think Australia would be today?

And, as to our Constitution being “full of holes” as you put it – the Constitution adopted as from January 1901 was crafted from the US 1787 Constitution and any cause for improvements identified in the intervening 114 years were incorporated.

Please list all the other “brand new” self-governing countries that have arisen in the last 224 years and please identify how and where their Constitutions are superior to ours. Try this LINK.