Even if you're not a big doomer, apocalypse theorizing and even planning/preparation can actually be fun and, if you're the kind of person to worry about that stuff, lower your stress. Feeling prepared for an emergency can reduce the amount of distress it causes, especially if you're already aware of the risk of the emergency.

Put differently: if you're concerned about the oncoming climate disaster, and find it causes you mental anguish, then you can either sit around and read more about doom, or you can find ways to release some of that tension. One possible way is to feel as if you're becoming as prepared as you reasonably can. This is much like, say, learning to swim because you're going on a boat. Yes, you probably won't fall in the water, but I bet you'll be much less scared of what might happen if you do.

Supposing that we'll always be here because... we've always been here is exactly the kind of thinking that's fucked our species.

The fact alone that more people aren't concerned over the fact that we've passed +1.5C in La Nina years even with aersol masking is horrifying. Look up 'blue ocean event' or 'clathrate gun' or actually learn about the increasing ocean acidification or the break down of the jet stream and if you're any kind of intelligent at all (which your comment has me highly doubting) you'll see a reason to miss such a community. It sounds like you're just another one of those who'd rather stick their head in the sand and worship your monied betters, though.

I had mixed results with the community. I got some great articles that I was able to share to raise awareness, some great book recommendations for everything from coping with stress to fiction to distract myself to useful sustainability topics.

But it also wreaked havoc on my mental health overall and I got downvoted for trying to find environmental communities that werent just big corporations in disguise or ineffective at their goals.

Overall definitely not going to miss it but a community that isn't afraid to talk about collapse while still trying to find some solutions (even if just small individual solutions) would be welcome imo.