Y'all have first past the post / winner takes all, don't you? There was a vote recently and "labor" won from what I'm reading?

Others have answered you that we have preferential voting, but I'm still really confused about why you're asking in this way? It makes if sound like FPTP would have stopped them from getting elected, and preferential would have prevented it.

As for what's going on, Dutton, the leader of the Coalition, and members of that group of parties associated themselves with Trump, who's really unpopular here. They also provided literally no policies to genuinely help with the cost of living issues people are facing, instead engaging in culture wars stuff. We have mandatory voting here as well, you can't just sit it out, so it makes the sort of apathy+populism that has gotten Trump elected not possible. The silent majority of voters rejected Dutton and the only other major choice was Labor.