Anytime my thoughts go down this route I think about how we’re all just sentient star dust, living in a tiny sliver of time in the history of the universe. Global climate collapse or not, our time here is minimal, so learn and enjoy what you can, and don’t fear the inevitable decay.
I know it sucks, but don't give up. I'm sure you feel pretty isolated and powerless right now, you're not to blame because this is the ideological work of Capitalism. Well let me tell you that you're definitely not alone. Maybe you can't personally reach out to people who believe in what you believe, but we're out there. The world is full of comrades, and soon there will be more because shit is going down and we will have our wake up call, don't think for a second we are done for, don't think for a second 1991 was the end of it like they made us believe!