three things: Australia has had a couple good PMs in the last 20 years - kevin rudd, for example.

but more importantly, in Australia, they don’t vote for the PM. They vote for the party, and the party picks the PM. And changes it as need be. Just like the US doesn’t vote for the secretary of the treasury, or the transport guru (whatever they’re called). The party assigns roles.

lastly, shit PMs is what Australia gets when it keeps voting in the Republican wannabe party.

The difference is the balance of power thanks to preferential / ranked voting.