Earlier quoted context omitted.
I don't think Greenspan is complaining - I think this is meant as a warning. He's not saying that Mark acted unfairly and that he should have been nicer to Aaron (which would come across as petulant, and I think Greenspan seems quite realistic and calm about what happened), but that Mark has acted with only ruthless, narrowly-defined "self-interest", displaying no loyalty or kindness, and this bodes very poorly for t…
Isn't this basically the same as saying tesla and spacex will fail because Elon Musk is a jackass?
Apparently Musk was a bit of a jerk when x.com merged with PayPal, and is supposedly difficult to work for even today (he works 100 hour weeks, probably demands the same high standards of his employees as he does of himself), but there's none of the skeletons in the closet with Musk as there is with Zuckerberg.
Plus there's the fact that Musk is tackling really difficult problems like online payments (fraud), mass-producing electric vehicles, making solar installations viable and aiming to make humans a multi-planetary species. Zuckerberg just created the latest social fad, IMO which is now in the process of self-destructing.