Founder CEO's who built the company up from nothing tend to be good. Non founder CEO's are often the worst kind of toxic "fake it till you make it" yes-men who just play politics. The worst part is that they will fill the entirety of upper management with people like themselves. If this didn't happen then there is no way startups could ever compete with the massive resources, domain knowledge and data of incumbents.

It is correct that the economy corrects a bit against this, but the incumbent advantage is so huge that even extremely mismanaged companies can live on for decades, letting these parasites thrive, build competitive resumes and then spread to healthier companies.