People who claim to have gone from a “Marxist”(which I doubt they ever had a real understanding of) to anarchist don’t make any sense. Do these people think ignoring the national and global level of the problem will better address it? Do they think the oligarchy won’t equally quell your pitiful attempt at anarchism with tanks and artillery the same as any other attempt to break free of the system?
How could anyone think anarchism could address climate change more effectively when it’s incapable of removing the capitalist system from power as we see throughout history?
This is what happens when you daydream on internet with open eyes in fantasy land. There is not much basis to their thinking, and is only subtly good enough to argue on Reddit and Quora because most people in these places have similar thinking limitations.