A lot of vintage restorers don't like him and people like him because he goes Wow! Look at This! and then suddenly a bunch of middle aged men with beards have that exact thing on their shelf. And those of us doing preservation and restoration suddenly are priced out of the hobby we've been in for decades.

Also, his technical "work" is not great. In fact, it's really bad. Even his successful fixes show a lack of attention to detail.

It's worth noting that he started his career as a computer scrapper.