because he is making the hard Brexit dreams of the ERG possible more effectively than any other person?
He is utterly ineffectual as an opposition leader.
He does not hold the government to account on anything.
He does not pop up on the media to argue policy points on any topic.
He actively supports a hard Brexit which will damage the poorest Labour voters.
JRM and BoJo and co must be very very pleased with their investment in him 