Nobody needs to convince the majority of the public the NatACT First government is bad. I'm pretty sure most people already have at least one reason to be mad about it, if not several. But about half the public still remain unconvinced that a Labour-led government wouldn't be worse.
If the Opposition want to change that, the focus of their public communications needs to shift. Away from slamming the NatACTs and Winston, and towards what they'd do differently, and why it would work.