Overall this is a major condemnation of Corbyn and his 'leadership'. If I were a member of Labour I'd demand he resign unless Labour wins a majority.
Trouble is that a lot of the moderate members have already left the Labour Party and so Jeremy Corbyn will have the support of the majority of members regardless of the results of the election. Indeed, as I pointed out upthread, a thorough drubbing at the ballot box would be affirmation to many on the left that they're on the right tack