The point is that Marxism "as it actually existed" isn't what this term is referring to. It's referring to Marxist theory, applied to dialectical struggles beyond just the bourgeoisie and the proletariat.
And Marxist theory is definitely not "masculine" or "authoritarian". Marx was always critical of the family and stressed the fact that marriage was a form of exploitation, famously comparing it to prostitution. This is why many Marxists have called for the abolition of the family, and why Marxist-Feminism exists -- it's just an extension of dialectical materialism with primacy placed on gender relations.
And Marxist theory is definitely not "masculine" or "authoritarian". Marx was always critical of the family and stressed the fact that marriage was a form of exploitation, famously comparing it to prostitution. This is why many Marxists have called for the abolition of the family, and why Marxist-Feminism exists -- it's just an extension of dialectical materialism with primacy placed on gender relations.