I am not sure just how BAD the environmental poisoning problem is going to get. But in general I agree with you.

To many things are about to hit us "all at once". COLLAPSE has started, albeit it's still moving fairly slowly at this point.

Basically,

EVERY year from here on out, is more likely than not, to end up with things being worse at the end of the year than at the beginning.

At some point, maintenance of our current civilization will no longer be possible and regression will start. When that line is crossed is when I think things REALLY speed up.

Modeling social responses to the Climate Crisis is actually much HARDER than modeling the Climate System. I feel like I have at least a "Sim Earth" level of understanding with my personal GCM. I understand the ENERGY flows and have a "big picture" visualization of the system in my head.

Social systems are SO MUCH MORE chaotic.