I was very much of this mind set and thought Corbyn was a busted flush. However what happened in the last week or so with his speeches and rallies, along with spending a lot of time with newly motivated youngsters (being an old timer) I have seen something new and vital emerging.
Old arguments about Trident, IRA etc is ancient history to a lot of the 'kids'. Ironically their political naivety means that basic values of fairness and hope resonate. Economic arguments of austerity have not delivered any economic improvements and debt (personal and national)is no longer a dirty word.
An election soon would instil a belief in youngsters that they can change the world and would pull in a lot more votes going forward. As an old timer I am comfortable with most of the manifesto and suspect its apeal is wider than most people except. I have turned from being a scepticle labour voter at this election into someone who will enthusiastically engage next time. I suspect the prospect that real change will now be seen as achievable will energise many more next time.