Do you remember 2017?
The Corbyn led Labour Party got 40% of the vote (up 9% from 2015).
The Starmer led Labour Party is currently on 41% according to the opinion polls (BBC Poll of Polls yesterday).
Corbyn was slaughtered by the UK press. Starmer is feted by the UK press. There is a reason for that. Corbyn ran in 2017 on a manifesto of plans that were supported by a majority of the UK people.
Starmer is running on a manifesto that barely has any plans other than 'stick to the Tory plans but be a bit less corrupt'.
Corbyn crashed and burned in 2019 because of Brexit - the Starmer policy that was incoherent and dishonest. Corbyn was too weak to change that.
But there is no reason to think that British people will not support clear, ambitious and radical governmental programmes as evidenced by the support for Labour's 2017 plans. There is every reason to think that the UK establishment will resist that as they always have done - but I have more faith in the people than you seem to, Sludge.