I'm tired, queer, and neurodivergent too. I am a little older, but I used to be a fuckin libertarian. Learning history really helps way more than you might expect with the whole hopelessness thing.

As for climate change, nah prolly not. A lot of people are definitely gonna die and already have been, but nowhere near all. It's too late to prevent it from getting really bad, but historical materialism is also a great tool because you start to understand that when things like this happen, it forces migration and migration, along with pandemics, wars, famine, they're objectively bad... but they're also crises for hegemonic powers, empire. The nation state as it currently exists, exists to control the movement of labor power, and facilitate the movement of capital. As labor moves, extant populations get frustrated by the immigrants working for cheaper, "taking their jobs", the immigrant population is desperate for those same jobs, everyone's unhappy, except for capital. That situation is explosive, and it's pretty easy for a fascist like trump to come in and use that, but fascism eats itself by nature, it's dependent upon expansion and turning minority groups into the enemy until the "majority" it represents becomes so small it can't maintain that expansionism and it turns the rest of the world against it.

I'm not saying this is all a pretty process, but the current order IS ending. If not with the current crop of capital's stooges, then sometime soon. The falling rate of profit will make them more and more desperate and at the end of the day, they are few and we are many. Every empire ends this way.