Perhaps the problem is simply with intent.
Shutting down coal power would achieve all climate goals for several decades and we can in fact just kind of do that in most places. Government subsidies are what's keeping coal power plants online in many locations. The problem is that this would impose costs on business owners, or force banks and/or governments to pay out large sums to those business owners (not that large though: tens to hundreds of millions per plant). In other words : governments worldwide would have to scale back what they're doing for a short while to instantly destroy their climate goals.
In other words: government, elected CHOICES are what's keeping the biggest co2 producers online. Governments absolute unwillingness, in Australia's case, to pay out relatively small sums they agreed to pay decades ago, and of course not getting a budget increase out of it.
Laws that are proposed, almost without fail, go after individual, totally insignificant co2 producers, and impose large costs on individuals for marginal, or even net negative gain (e.g. well known example: for the longest time, and maybe even now, solar panels were net-negative, and certainly, in the short term that's still true. Certainly in the short term switching to solar power increases CO2 emissions, it doesn't reduce them. It may become a net positive after 10 years of constantly using the panels, under idealized conditions).
Suggested changes to individual lives, like forgoing cars entirely, impose yet larger costs but thankfully for now governments are mostly unwilling to do this.
At what point do we get to conclude that the intent of climate action parties is simply to exert power over individuals, to capture government, regardless of all costs to the climate ? That these parties not only don't care about climate change, but are actually willing to sacrifice the climate, just to gain power ?
Besides: I think it's extremely telling that nobody is willing to consider geoengineering (artificially lowering out planet's albedo). We know methods to do that, and of course all governments promptly decided that was off-limits (with, get this, "what if we're wrong" arguments. Look: either climate prediction works, or it doesn't. Denying geoengineering solutions is little better than outright denying climate change entirely).