There’s no climate scenario short of nuclear winter that renders the planet completely uninhabitable by humans though. We’re not facing a situation like The Road where the sunlight is completely blocked, killing every plant. Even with the worst case climate change scenarios, people are going to be able to find habitable areas and move plants to new regions where they will grow, or utilize technology to grow crops indoors, which already happens

We’re likely to see a lot of suffering and disruption along with increased mortality, but humans are way too resourceful to go extinct, even with a severe disruption to the climate