Yes it's absolutely depressing. Also just thinking about the idiocratic/authoritarian/right-wing movement that doesn't want to do against or even wants to accelerate climate-change.

But apart from good things that are happening right now (as I just watched it https://youtu.be/vUA1kFSJnYQ)

Think about it, there are what > 8 billion people in a highly developed /technological advanced world, how realistic is it really that everyone of them will die for good? Evolution took all kinds of measures to avoid it. There will likely be humans (unfortunately likely those that mostly caused climate-change) that will survive. We can already create artifical climate, there's vertical farming that can be isolated from the outside. Even if we're approaching a hell like planet with > 10 C warming, it's not that we don't have very cold places that may be suitable for living then. Yes it will be a lot less people but I don't believe in a total collapse. We have all kinds of redundancy with data storage etc. know-how won't just be lost.

Also while all of this is happening rapidly on a geological timescale it's still slow for humanity and it's ability to adapt. We're still talking about centuries, for the hellish kind of development. It's getting uncomfortable the next decades, but likely so that humanity will finally grasp the fuck up, and takes effective counter-measures. Also the probability that we advance quick enough to sequester carbon so fast (and find safe geoengineering), to reverse at least some of the tipping points is still on the table.