I do agree - climate change is a massive problem with thousands of facets, trillions of dollars at stake, and stakeholders including everyone from all global citizens, all global creatures/environments, and all businesses/governments. It's truly the biggest crisis we've ever faced as a species.
In my view, on rich vs poor nations, if China handled its emissions much earlier and more aggressively, we'd still have massive historical emissions and massive per capita emissions in North America and Europe. Rich people tend to decry those not using renewables and not transitioning quickly, however it's easier to transition/decarbonize with EVs and solar PV and energy efficiency when your economy is already developed. Long commutes, western diets, leisure travel, copious heating and air conditioning, and many other factors are not present in other countries which still have "dirty" economies with longer ways to go to both energize their entire populace AND to clean up said energy sources. So, westerners should look in the mirror before they criticize those people just getting electricity or their first car in the last decade.
The rays of hope I see for climate change come from the potential for energizing nations to skip over total fossil fuel dependence in their industrialization and modernization schemes. Furthermore, there are bright spots in electric buses (huge wave of these will come in next decade), in renewable deployments (~2/3 of capacity additions in recent years in USA), and in overall business movement towards low carbon solutions. While national and state policy-makers could move more quickly, surely, there is a lot of innovation occurring in the private and local levels.
Long term, even if we decarbonize very quickly due to technological innovations and S-curves, I foresee needing to use environmental engineering techniques to cool the planet. While risky, I think the level of economic and societal harm from the heating/expansions of the oceans and further ice melt will necessitate some sort of artificial cooling of the planet.
While some may deem this as unethical or playing God with our planet, IMO we've already irrevocably changed our planet's heat content. We need to not only pull our foots of the accelerator, reducing emissions of GH gases, but we also need to put our foots on the brake, somehow cooling the planet and/or sequestering previous emissions. If we don't take these latter steps, no amount of decarbonization will prevent catastrophes of hurricanes, fires, flooding, desertification, and sea-level-rise in the next countless generations.