Both interesting reading, thank you. I also found these articles from Paul Mason quite good reading. They are along similar lines but with different points.
https://www.newstatesman.com/politic...sectarian-left
https://www.newstatesman.com/2019/12...entre-and-left
https://www.paulmason.org/wp-content...ynism-v1.4.pdf (this one downloads a pdf I think)