It’s not hard from a left wing perspective the EU prima facie case of has to go. Yet left response a sniveling Remain vote cos they’re frightened of change! Then they wonder why people vote Conservative and UKIP! Who offer simple narratives and kneecap poor people like it’s going out of fashion but hey it’s an ethos. Lifelong anti EU Corbyn disappears in a campaign he could have led. Look at Greece grovelling before economic sociopaths like Jeroen Dijsselbloem.
The point is whether it’s Labour under Corbyn or Tspiras or Hollande we’d be better off not bothering. The left is skeptical of everything except itself. That is a conceit.