Author even tried mastodon and promptly quit.

Why doesn't they elaborate on that either or do they just want to underline their point that the Fediverse is too broken and user unfriendly without giving any reasons?

Then they say that instances are confusing, which is an essential part of the Fediverse. Do they find it confusing that you have to pick a website (one of which being reddit.com) to visit aswell?

Bad article all around.