When you're a co-founder of a business, and someone rags on it, they take it very personally. They might not make it apparent to the public, but they care, a lot.
If he cared that much, then why would he leave? A captain should go down with his ship. Here's a guy who made a boatload of money, and now he's leaving 4,000 employees behind who are probably going to be looking for new jobs inside of a year. He should take it personally.