My wife has been at the top of HR of a couple companies that you would know.
She often says she has fired more Harvard graduates than any other school. For the reasons you mentioned.
They are all attitude and no productivity.
One entry level Harvard grad in particular wouldn’t do her own job but had a nasty habit of going to Executives in public places and lecturing them about all the things she thought they were doing wrong.
After she burned through a couple Personal Improvement Plans, she was terminated. Last I heard, she was calling her old coworkers, trying to get info to start a discrimination lawsuit.
But the common thread with the Harvard people is that they think they are way better than they are.
The benefit of becoming a Harvard graduate, is never again having to be impressed by Harvard graduates.
the thing with Harvard or any other uppity university is ACCESS to other blu bloods.....someone who has the time and inclination should do a study on how many huge celebs/politicos roomed together....