It's not so much a misunderstanding of concepts, it's people using 2 different definitions.

You must know by now that misandry can both mean "systemic oppression of men" and "bigotry against men" - sorry, "unfairly being mean to men", just as misogyny or racism can mean different things in a systemic and personal context.

People are complaining about bigotry, or "being meanly treated" if you want to imply dismissiveness, and the word they use for that is misandry/racism/misogyny - that these words imply systemic oppression in an academic context doesn't matter, we are talking about the other context.

And if you think it should not have this other definition at all, because it makes it harder to talk about the more important systemic issue, or for another reason: don't be a pedantic prescriptivist on these definitions, language is fluid.