Our voting system is nothing like the Americans. Hence people should abandon the Labor party and strengthen others by getting active there instead, all while preferencing Labor above the Liberals and One Nation.

Liberals and One Nation only have space because how pathetic the Labor Party is at providing a viable left-wing alternative that people are actually excited for. People are swayed by One Nation because their material conditions have worsened, which is the culmination of decades of neo-liberalism ushered in large part by the Labor Party.

I'll say it again, left wing people should abandon the Labor party because it's been going this way for decades.

Join a party who shares your values.

We don't have first past the post, so your point makes no sense.