Why does the latest IPCC climate report scare you so much? While we're still not on a great path the worst case scenario has gotten better.
That means mass migration and conflict over resources, and a deteriorating ecosystem that we still very much rely on to produce food and healthy living conditions.
https://www.vox.com/22620706/climate-change-ipcc-report-2021...
Basically, scenario 4 or 5 outlined in that article is what I see happening. Sure, it's not a guaranteed extinction, but it will devastating, and it's far more likely than a GAI takeover.
On the bright side we may have killed the cycles of glaciation that would have been awkward in the future, to put it mildly. The cost is going to be so heavy though.