i think the 'authleft' (at this point the political compass as a phenomenon should be a gen-ed 3 credit-hour class btw) was mostly gen x and millennial doomers with a lapsed DSA membership who thought if America didn't decline we'd start a nuclear war. you experienced the optimistic slice of the terminally online slice who were fans of pretending to have read theory and then arguing with anarchists, please keep in mind that every group of terminally online people you are tempted to generalize should be treated as about 1% of their representative population, assuming posting on social media is their only hobby.
no matter what set of ideological clothes you put on, the fall of America and rise of China was clear to anyone with open eyes as early as Obama and to schizos as early as Tienanmen square