I find the detail of this Wikipedia page to be amazing. It was shared 2 months ago (thanks @SamC). The main things that have changed since then are a continued slight dip in Labour/National and a slight rise in Maori/ACT.
If you have the time and energy then remember to read the policy proposals by the parties that you don’t like as well as the parties that you do like.
My takeaway is that people of NZ are sick and tired of falling house prices, low unemployment, competent management of the economy, stronger unions, competent management of unexpected natural disasters and terrorist attacks etc. They are sick and tired of signing free trade deals with the largest economies in the world.
They are just done with all that want to get rid of anybody who had any part in that.