Boris is duplicitous but Corbyn is an enemy of everything I hold dear.
Corbyn's default position is that the UK are always the bad guys. Always. He doesn't like his own country much. He doesn't realise that the working-class folk that he wants to appeal to are mainly patriots. So he's going to lose their votes too. Basically he appeals to armchair liberals who are anxious to be seen as desperately worried about poverty while sitting around their Noguchi coffee tables convinced that somehow they have the moral high ground all to themselves.