Frankly, the biggest blame lies with Russia. They saw climate change coming, right after coming out of COVID-19, and they said “Y’know what would be a good idea? To go full conquest mode given our short-term advantage in the oncoming crisis’ and force the rest of the world to have to cut back on their climate change pledges to defend against our imperialism.”
I mean, not that the climate pledges were doing much, but Russia went in the completely opposite direction and gave countries the perfect excuse to give them up. I’m definitely not claiming other countries have no blame, but even China and the US were at least posturing against climate change.