Business is business. You make hires in any business that you think will work out or make sense. You give time and expend energy as a boss to promote your culture and you have expectations. When you see the productivity is not where it needs to be or someone is not buying into your culture, then you have to move on. There is no one that has run a business that will say they've always made smart hires.
Interesting. So if I'm a successful business owner of a dive bar in Whocaresville, Iowa, I will have no problem running a football team? I mean, the business is successful, I have to hire people, I have to promote my culture or whatever, and I have expectations. Checking all the boxes, I'm ready!
Sorry, not all businesses are the same. It's not just about hiring (the process of which is also not the same from business to business). The structure of the businesses are completely different, the staffing systems are completely different, the products are completely different, and the market is completely different. This isn't to say that he cannot adapt, although it has been 11 years and he's still doing his weird piecemeal approach to hiring and firing, but it's most certainly not a seamless transition between businesses.