Absolutely miles off here pal. Of course Corbyn has to shoulder the blame for the election defeat, but there were sitting Labour MP's in the media on a weekly basis telling voters that Labour were the most racist organisation ever, and that they should vote for the Tories. These MP's were then rewarded with peerages and cushy jobs with gambling firms, weapons manufacturers and pay day loan companies. But Corbyn was the one doing all the serious sabotaging ?
Your second point makes zero sense. The party have already purged the left. There are no 'radical lefties' left in the party. They were told they were scum and not wanted, but it's also their fault for not voting for Starmer and trying to bring him down in some 'delicious irony' ?