Mary Creagh, one of the Labour MPs who lost her job at the election, accused him of being narcissistic, and it is so fascinating to me. He has also been accused of this by another MP who worked for him, Kevin Brennan, in 2016:
"For all those people suffering from welfare cuts and Tory policies they will have no one speaking up for them because of the self-indulgence, egotism, arrogance and narcissism of one man - that man is Jeremy Corbyn - he needs to resign."
Having looked at his behaviour, especially since the election loss (and the no-confidence vote referred to above), I think they are onto something and that he has managed to delude so many (mostly young) people into believing his mantras and that he actually gave a shit about them. The fact that others viewed them as a "little brainwashed" and cult like also makes sense if this is the case.
I have always thought he is far from honourable, but his insistence that he is still right despite the massive rejection by the population is unbelievable. He has no humility at all, he pretends he does by using poor people's circumstances to further his own image, but the fact he literally cannot admit he is wrong is such an awful trait, common to narcissists.
I think kind hearted people (empaths) often find it quite difficult to spot narcissism, and can easily get duped. And there is lots of research showing that more agreeable people tend to vote more left. I think Mary is onto something, and he's done a good of being a (probably low level, given) covert narcissist, constantly displaying his belief that he is superior to everyone ("the only one that cares"), that people who don't agree with him are just wrong (Straight to name calling like bigot etc), and refusing to give up power (twice)
Seems to me as you look at him now, his whole campaign with the intent of giving was more about him and less about those to whom he was proclaiming to give to.