The post on hexbear tries to act as if they were seriously considering the anarchist point of view, they are constantly being disingenuous.
I think you're confusing dismissing your viewpoint after engaging with it in a serious way with being disingenuous
The biggest point of critique againstEngels is that he is effectively strawmanning anti-authoritarians, by using a definition of authority that differs from the anarchist definition in a fundamental way.
You mean the definition of authority that the video you linked as a rebuttal is based on? Because that is the one that is being critiqued in a Marxist Response
he repeats the same mistake that Engels did and takes Engels’ definition as the only logical one
The argument is that the alternate definition that the anarchist proposes is incoherent.