There's a lot of negativity about Ferris in this thread, and it's clear he's a very divisive figure, not only here on HN. But I wonder, what about those succes

There's a lot of negativity about Ferris in this thread, and it's clear he's a very divisive figure, not only here on HN. But I wonder, what about those successful startups he advises? Surely, if Uber, Evernote, WordPress, and Shopify are happy with his services, he can bring something to the table? I'm genuinely curious why all the negativity. Just in case anyone's wondering, I'm not particularly a fan of his either, but I'm open to the possibility he can add value to companies.