The poll was done by redbridge, one of the major political pollsters here. Though pollsters do occasionally get it wrong on political issues, I honestly don't think they would publish such an overwhelming result if they didn't believe it was robust.

Though the op's article was from October, the poll was done and published early this year, just before our federal elections. The same election where the conservatives tried to go with MAGA-style culture wars. So if I had to guess, there may be an element of fatigue with the strategy of cosying up with the far right fringes shown in the result of the poll.

And yet they still didn't get the message. After their disastrous loss, there were still many in the party that said it was because they didn't go far enough right..