Stack ranking basically chooses sociopaths over the nice guy. Applied over several years it is bound to have a statistically significant effect on who your middle layer managers are.

It does not matter if Nadella is a nice guy. It does not matter if everyone reporting to him is a nice guy. They are still forced to operate with a megacorp filled with lizard people.

On the other hand, it might be just the usual confusion that large administrative structures needed for megacorps cause.