What makes you believe it was his management specifically instead of other factors? AFAICT he has been at Blue Origin for only a few years, so the root of their success may have been laid much earlier and they succeeded either because or despite his influence.

Not saying he's a bad manager, just that the fact this one launch was a success is not proof of his skills. Luck is definitely still a possibility. And as a sibling comment mentions, it's not like he has a flawless track record.