Without naming names, as that would be too identifying, the issue there is actually that Jensen was a bad and weak manager. Part of the reason for his accumulation of direct reports was not straightening out interpersonal issues amongst his reports - he has multiple sets of multiple reports each where they would naturally have a single owner but because they hate each other he couldn't have any of them report to any of the others (looking at you, Mellanox). This is a basic failure of managerial skill.

Jansen was once an engineer and a solid evangelist, but he doesn't really appear to have any skill at managing people.