I am shocked and appalled at the disloyalty and treachery shown to him now, by people he must have known and worked closely with for years
CremeEggThief he is notorious for not having spoken to most of the PPLP for years, hardly knowing who anyone is, voting systematically against previous party leaders, and having stayed pretty much out of Westminster and only hobnobbing with his mates for a couple of decades now - he didn't work closely with pretty much anyone apart from Abbott and McDonnell!
Agree with pp that I don't think he comes across as a decent and principles man, but a bloody-minded and stubborn adherent to his own ideas despite the need for flexibility, openness, and consensus-building being a huge part of the leadership role.
His sabotage of the Labour In campaign, deliberate or not, was appalling undermining of his own party colleagues - disrespectful to them and deliberately making himself difficult to work with. He wouldn't even have a meeting with Alan Johnson, a senior party figure and the head of the Labour In campaign, until after the referendum was over.
It's hardly evidence of great principles to not be entirely truthful with the public and the party, and pretend to be supporting a cause you're not really supporting, whilst undermining it at the same time. I'm actually quite horrified and shocked to see the evidence of how much Corbyn and his team went out of their way to remove references to the referendum from speeches, not turn up at events they had said they would, and so on.