It’s the other way around - because the establishment has so much to fear from anarchism, they peddle anti-anarchist propaganda. If we renamed anarchism, they’d just do the same thing. Anarchism does exactly what the name implies - against heirarchies.
I’m not really sure I understand what you mean, sorry. Lots of people have misconceptions and some of those misconceptions are intentionally fed to us. You know, propaganda and such? Lots of people have a really skewed perception of what anarchism is, so I guess that makes them wrong about anarchism, if that’s what you mean!
I mean when everyone else has a common understanding of the term, and you're the only one with the "correct" understanding, doesn't it make more sense that maybe you are the one with the misunderstanding?