It isn;t a desperation for them to fail. It is frustration that we were told (not just by salty Tories) they were gonna raise taxes that they denied and how quickly this is coming to fruition. There is a lot more to tax that affects working people than direct things like Income Tax, NI and VAT.
Also the fact they talk about a black hole, have rallied around their media pals to get it to be the narrative all the while independents like the IFS have asid it is BS. That you guys choose only to read or listen to sources that are pretty much their media wing is on you. It was predicted, it is happening. Simples. Not saying Tories would have done any better. they are all as bad as each other but Labour knew how the finances were, "fully costed" their manifesto based on it and even said the OBR would be able to chime in on policy costings atm. No-one hid anything from the OBR. Labour just overpromised based on numbers and now they;ve decided to up their promises their "fully costed" manifesto is no more. Politicians be politicians though