I am somewhat puzzled as how the Tories getting an absolute shell-lacking by a centre-left (sic) party can be described as neo-nationalist-right wing parties being in the ascendant.
Many of the seats the Tories lost would not have been lost if Reform were not running and the Tories had received those votes instead.
Indeed. The Tory vote has been split by a neo-nationalist right wing party, with Labour the default beneficiary in terms of seats, thanks to FPTP.
Despite the purported "landslide", Labour's vote share has barely increased since the purported Tory "landslide" at the last election, and is substantially lower than in the one before that, which Labour narrowly lost.
It's nigh impossible for any govt to fix the discontents which have sunk the Tories in one term of office - even if it had a plan to do so, which Labour hasn't. And this country is much less forgiving of Labour govts than Tory govts.
It's now conceivable that Farage will take over the Tory party, much as Trump took over the Repugs, which was inconceivable until not long before it happened.
As in the US and Europe, UK mainstream politics must now contend with a proto-fascist insurgency. Nothing to celebrate here, I'm afraid.