Their manifesto was exactly what you'd expect from a populist party. Promise the world with no indication of how they'd actually achieve it.
They promised to raise the lower rate of income tax threshold, increase the highest band to 70k, reduce corporation tax, raise the threshold on stamp duty, increase the inheritance tax threshold, scrap interest on loans for university students, and give tax relief on private school fees. Whatever you think of each of those policies, all of them cost money, and the only way they claim to be able to pay for it is by 'cutting unnecessary red tape.' Hell, that must be a lot of red tape to raise that kind of money. Literally the only thing in their manifesto that would save money is scrapping the rest of HS2 and scrapping net zero, and yet they pledge an additional 17 billion for the NHS (way more than the other parties).
Then there was all sorts of bullshit around migration acting as a dog whistle, like preventing migrants from accessing benefits, which they're already not entitled to (but we'll rely on our voters being too ignorant to know that). Or only allowing 'essential' migrants in, which basically translated to mainly health workers, but then also promising to charge these migrants that you're no longer allowing in double the national insurance of British people (even though they're not entitled to any of the benefits that paying NI brings). So they're simultaneously claiming to use migrants as a cash cow to reduce your tax burden, while promising to get rid of migrants (they specifically exempted health workers from the 'double NI' rule). Which is it? It can't be both.
The rest is just culture wars bullshit around 'transgender ideology' and 'ideological universities,' and half-baked ideas like "we'll take migrants back to France" as if France wouldn't have any say in that (kinda like they promised with Brexit).
Even I like some of their policies, but that's kinda the point. They know they're not going to have to deliver any of it, so they know they can throw in something for students, something for the working class, something for the toffs and business-owners.