Reddit mentions of K-punk: The Collected and Unpublished Writings of Mark Fisher

So as others have said these are basically internet problems and if you log off and do some IRL political activism then those problems are much much less bad (not perfect, and I do understand that you've already had one negative experience of activism, but a lot better).

I'd also say these are largely bubble problems and if you step back and try not to take the political bubble too seriously then you will also find that helps. A lot of what you're talking about is basically the "office gossip" of the left, it's not really the substance, and just as if you spend your time at work getting involved in the gossip and not the work then you'll get depressed so too with the left.

But insofar as there's a substance issue here I do have someone you might like, but I'm giving you a health warning first. I personally feel identity politics is very important and if you negate it what you end up with is the "dirtbag left" (ie eXile, chapo etc..) which just very quickly becomes quite toxic and entitled and complacent. It's important to have compassion when thinking about people whose life experiences might be different to your own, otherwise the slide down the slope into the alt right is alarmingly short.

Now, all that said, the man you're looking for is Mark Fisher (RIP), Vampire Castle, K-Punk and Acid Communism. He was a controversial figure, but I think you're going to love him, and he's much more nuanced and compassionate (and clever) than the dirtbag crowd

Books:

#ACCELERATE

Inventing the Future (Left Accelerationism)

Libidinal Economy (Lyotard)

Anti-Oedipuis: Capitalism and Schizophrenia (Deleuze and Guattari)

Capitalist Realism (Fisher)

K-Punk(Fisher, a newly released anthology)

Articles:

This is the best introduction I've come across

The MAP (Manifesto for an Accelerationist Politics)

This article from The Guardian

Did you mean the Fisher book? If so then yes it's in print and ebook. The quotation is from its final chapter, which is the draft introduction to his never completed book, Acid Communism.