Well if the Tories can't fix it then we are really fucked, because sure as hell a Corbyn-led Labour government cannot.
Do you never even bother to ask yourself how on earth all of Labour's spending pledges could be sustainably paid for? Are you simply in "I'm not listening, I'm not listening, I'm not listening" mode? Or are you genuinely serious about making an informed decision and prepared to engage in some open-minded thought about how deliverable their promises actually are?
There are some people who think they can make it work. https://www.ft.com/content/d6f56834-0f78-11ea-a225-db2f231cfeae
In reality, practicalities of parliament mean Labour won't get the more extreme stuff through unless they win an unlikely majority. The hysterical reaction to the manifesto is way over the top. Fact is, reality will bite and if they can't afford something, they can't afford it.