Anarcho communism is not a vanguardist ideology... Marxist analysis is useful without any notion of a vanguard party, which I feel was a failed idea. Of course there have always been anarchists and marxists who disagreed with the vanguard party idea, but they were suppressed by the authoritarians and famously executed in many cases.
I don't think Cory Doctorow is a vanguardist and neither am I.
We often view those on the right as beliving they should rule over us through acquisition of wealth and subsequent control of the means of production. I don't think it makes sense for billionaires to control our world, which I view as a form of "rule".
When I say I am an anarcho communist, I mean things like: we should make more of the world like wikipedia, and roll back draconian intellectual property restrictions. I do not think I should run an army full of people with guns to control your town. Nor does Doctrow from what I know. I have seen people on leftist subreddits who do think that, but then that's internet comments for you.