and its discontents

It's a riff on Freud's Civilization and Its Discontents. You can check the overview, the ideas will probably seem pretty familiar because they were so influential at the time.

You could probably classify all of the guys on the podcast as discontents of Solarpunk, in that they are somewhat critical of it as a genre, as an aesthetic and as a movement towards revolutionary change. In a lot of ways, because Solarpunk often reifies those modernist conceptions of Civilization, while painting them green.