Most of the points they elaborated on are People problems, not Mastodon problems. The genuine critiques of Mastodon they listed are migration issues, updating posts (it makes sense 'edited' posts lose their clout), and character limit (already way bigger than twitter's).
Also, aren't they falling into their own "Us vs. Them" argument by complaining about general Mastodon users?
People problems and technical problems aren’t so cleanly separated. People speak in pithy soundbites on Twitter in part because of who they are, and in part because of ergonomics of the platform (limited character counts, etc).
Mastodon is a place as much as a product. The technology affects how we interact, and how we interact in turn influences design choices.
Also, aren't they falling into their own "Us vs. Them" argument by complaining about general Mastodon users?