I'll attack our voting system.
It's better than FPTP, but that's like saying the meal your restaurant is serving is better than literal cow shit. It's not the compliment you seem to think it is. The latest election results do a pretty damn good job of showing the problem. The fact that a collapse of the vote for the right-wing party resulted in a collapse in the number of seats for the left-wing party, to the benefit of the centrists, is a completely aberrant result that happened because of the odd ways IRV behaves. Even other preferential systems might not have had that effect.
But the real answer is that single-winner systems like both IRV and FPTP are poor fits for a diverse population. What we really need is a proportional system, like the Mixed-Member Proportional that they use across the ditch, as well as over in Germany.