Sigh.
I think you are trying to point out that we were wily enough to survive past swings with a fraction of the technological arsenal we have today. Is that fair?
We know some humans survived history. How many? Where did they live? Did the survivors stay in a single place called "home" for thousands of years, change be damned? Did the survivors follow good weather and food? Did they live near the ocean, where all temperature variations are smoothed out? Did they migrate for adventure, or follow the whims of season and climate?
When they moved to a new place, were there already humans there? Was there enough space, shelter, and food for both groups? Did they welcome each other, or fight?
It's not that I think you're wrong. We're creative, resourceful, persistent, stubborn, and adaptable. But I think the picture you're making leaves something important out. For most of that graph, we were smart, rare, small-group primates that used wit, teamwork, and basic tools to overcome our natural environments.
It's probably no coincidence that metalworking turns up so near the emergence of our early social and organizational super-organisms. You don't need bronze tools to hunt shellfish, fruit, or rabbits. Our super-organisms needed them to raze forests, clear land, excavate rock, and make war.
Surviving climate change is not be about overcoming our environment a final time. I agree, that is a fight we could win. Surviving climate change is about overcoming our nature as individuals, the nature of the social and organizational super-organisms we form, and the historical accumulated impact of both with interest.