Some recent critiques levied at DSA's organizational strategies peddle in an aesthetic-radicalism that risks distracting the working-class from organizing itself into a disciplined political force.
In the contemporary US left, this phrase refers broadly to the amalgamation of anti-capitalists whose entire ideological motivation and self-conception is that they are “to the left” of XYZ, typically DSA. While there are organizations that participate in this sort of branding, it is most commonly done on an individual level. We can disagree on whether ultraleftist is a helpful term, seeing as it is best defined by an “I know it when I see it” approach, but I think the title applies to enough of a grouping that it is worthwhile. Terminally online, constantly accusing others of being sheepdogs or sellouts, and rarely working with others to expand the socialist movement through mass action are some of their calling cards. Their actions speak to wanting to be King of the Smallest Kingdom.
Makes plenty of sense in context.