If this is an accurate account, it’s remarkable that he seemingly remains devoid of bitterness about this treatment. From The Candidate, by Alex Nunns, loc 6251:
“You are not fit to be prime minister,” the widely unknown Bridget Phillipson tells Corbyn. “It’s time to be honest with yourself. You’re not a leader. You need to go for the sake of the party,” remarks Ivan Lewis. “You are a critical threat to the future of the Labour Party,” chimes in Jamie Reed. “You’re not uniting the party. You’ve got no vision. The only person who can break this logjam is you by resigning,” pronounces Chris Bryant. “You’re not just letting the party down, but the whole country,” declares Labour’s only Scottish representative, Ian Murray. When he claims—without evidence—that his staff in Edinburgh have been “intimidated” by members of Momentum, another MP shouts “Scumbags!” Murray tells Corbyn to “call off the dogs.”