But the left doesn't have particularly good logic/wisdom about individuals and individualism. As has been abundantly shown in this thread, most (not all) leftists scornfully dismiss individualism. The vast majority of people I have met, meanwhile, treasure it and would never contemplate giving it up.
The corollary of the dominant left habit of demonizing individualism is well dsiplayed in your own diagnosis above: The problem, you say, lies in the worldview of ordinary individuals, who fetishize and internalize ideas like "consumer."
Bunk. "Consumer" is an label imposed upon us by the masters of the institutions of illegitimate power. To the very small extent ordinary people think about that label, they merely tolerate it.
Mature (sociologically realistic) individualism is a very good and precious thing. As Marx (unlike so many of his later followers) knew, cultivation of the necessary conditions for bringing this quality to the forefront for the masses was the essence of the socialist project, which is supposed to launch real human history by ending our benighted pre-history.
I say it again: You are simply wrong about individualism.