This, and most things like this, assume that all of us react the same way. But we don't. We're not ants in a colony. Even ants don't all react exactly the same.
Many people have reacted and have taken steps to not only lower their carbon foot print, resource usage and survivability but to make it so that their descendants will also have a better chance of surviving. In some cases these positive reactions are localized and even regionalized.
A "Collapse" is not going to be something that hits all areas equally. Rather there will be some places that are devastated, most likely urban areas who were living high on the energy hog. But there will be many rural areas where the effects will be minimal and life will go on, with some adjustments.