I think calling it an "absolute piece of garbage" is just wrong. I mean, it has many great features. The sensor is great and it has a very weak AA filter, so the photos are very sharp. The AF isn't as fast as a DSLR, but after a firmware update it is acceptable for my uses. Of course, some types of photography need faster AF, but most don't. Its just a matter of patience. And really, the firmware update changed it significantly, the original firmware had very slow AF.
Button placement.. meh, I don't see the problem. It has plenty of buttons, as many as any entry DSLR, plus green, plus red button. I find them to be completely functional, and I use many old manual lenses that require green button metering. And I set the red button to be focus peaking (or DoF preview sometimes). I can't complain about these buttons. But sure, it takes some getting used to, just like with any new camera. I think its buttons are still much better than many entry level cameras, bridge cameras, P&S cameras, etc. But of course, it doesn't have as many dedicated buttons as some more advanced cameras. Because it not meant to compete with the D3 and 5D, its meant to be below the level of the K-5.
Oh, and of course there are features and elements of the K-01 that could be improved, but a) it was the first of its kind b) it was an experiment and c) any product could be further improved. I think the main mistake Pentax/Hoya did was the initial price of the K-01 being too high.
All that being said, the titular line is just an opinion, and I won't stop watching their videos just because of this one line. There is a difference between the reviews and this type of "debate" or "discussion" video. And we owners of the K-01 are used to harsh comments from the photographers community - and many more compliments from everybody else
Seriously, with no camera before did people genuinely look at it and say it looks good. And then when they see the photos they are surprised that its not just
form over function, but the good-looking camera also produces good photos.
To each their own. Enjoy your gigantic black box with edges everywhere and a big angry mirror furiously pumping inside.