Half a decade of complete and total smear bombardment in the national media takes a hell of a toll it turns out
Who is going to hear "The labour party lost a defamation case on purpose" and not be inclined to dismiss it as conspiratorial? It's depraved the depths that anti-Corbyn Labour insiders have gone to smear him, and that they consider decades out of power as an acceptable cost.
Was it the anti semitism accusations?
Look at what the British press looked like. Exhibit one. Exhibit two.
It was an issue while he was the leader of the labour party as something he had done in the past. The IRA being pretty unpopular in England as they famously blew up just regular English people at pubs and that
tbh the little attention I give to electoral politics is on local politics as there is a solid historical precedent in this shithole country that the only way to get a national government that is remotely aligned with the interests and wellbeing of the people is via a Faustian bargain that involves the largest loss of human life in history, resulting in a brief lapse in chauvinism that allows you to win, and even then you would have a good case to make that it would not be a fair deal, especially when all you'll get is a single term in power.