Climate change is not going to be literally the end of the world, or even human civilization. At the worst we’ll see mass immigration to the global north and the centre equatorial band become more difficult to inhabit.
Farm yields will probably drop to some extent, and we might see a few wars, but we are fairly well equipped to survive.
https://en.wikipedia.org/wiki/Optimism_bias
My father was an environmental scientist, I grew up reading New Scientist. The science is far less optimistic that you want it to be.