See even here there's no reason to be this doomery.
Yes, climate change is a massive problem, and humanity is ignoring it to our own peril.
But peril here means the unnecessary deaths and displacement of hundreds of millions of people - a civilization-defining tragedy no doubt, but ultimately nothing so serious as to cause our extinction.
We have the technology and knowledge to adapt, change course, finally get of fossil fuels, and enter into a new age of sustainable renewable energy.
We're gonna do it too late, and whole ecosystems, species, and far too many humans are all going to perish. Sea life may become extinct.
But at no point is our survival as a SPECIES in question.
Sadly, that's looking less and less likely as time goes on.