Have you even read the blog? The UIs in question are, for the most part, immediately recognizable as bad. It's not about artistic or aesthetic interpretation. It's about this is not how any sane or competent person would design UI.
There are a few that are fairly cluttered visually, but the vast majority are simply different, and I can't say, looking at them, whether or not they'd be any good in practice because I haven't used them, and I'm not so full of myself as to believe that I know everything about something based on a single picture of it.
For instance, there's nothing obviously wrong with the interface of the grammar app currently at the top of the blog, but he goes off on it like it shot his dog.
Not just strange – incorrect. iOS UI vocabulary is designed for touching. You have a big meatstick you can freely move around and squash against whatever interests you.
This does not apply to the desktop. On the desktop, you have a plastic puck you need to shove around a surface, which moves a pointer to a designated area. At the most advanced, you're massaging a glass tile, for the same effect. By merit of these facts, the interface must work differently.
It's a lazy design, by someone who couldn't be bothered to learn the correct UI paradigms for a desktop app. It doesn't make them a bad person, it doesn't mean they caused any grievous offense, it simply means they made a bad design. This isn't subjective.
