Admittedly not at all for their own good and purely in pursuit of his own goals.
He is widely acknowledged as a big part of the reason why Facebook is “the way it is” as this pipeline of radicalisation for a huge number of people.
He then repeatedly abused his access to that kind of thing by working with groups like Cambridge Analytica and Steve Bannon etc for explicitly partisan purposes to further fuck with vulnerable people.
I can’t ever forgive that.