I guess im answering the question "what are common myths that are produced by syndicalists/part of the mythology of syndicalism" rather than "about" but i think one of the most fundamental mythologies coming form syndicalism revolves around the fact that self-managed work is meaningfully liberatory, that it constitutes a fundamental shift of relations, when in my opinion, is actually just a change in form, rather than the content that makes up life. Im going to limit my response to this for now in fear that i may be selectively interpreting your question.