I don't think it actually would be in the interest of the country for Sunak to stand down right now, because it would give us our fourth Prime Minister of this parliamentary term, and the third completely unelected one.
It might be in the interest of the Conservative party, although I think no matter who they appointed they will suffer an absolute thumping at the G.E., but it wouldn't be in the interests of the public. IF he had any decency, he would have called a G.E. as soon as he was elected Conservative Leader, but this is yet another aspect of the farce that is a country that proclaims itself a leading light of democracy, yet has no formal constitution. Everything functions on the assumption of a basic level of honesty and integrity on the behalf of the individuals involved, and if the public are stupid enough to elect venal, corrupt, self-serving arseholes the likes of which have completely taken over the Tory party in the past 10 years, then this is the inevitable outcome - government that serves nobody other than the people in it, and the few with a vested interest in putting them there.
Best we can hope for is that he decides to rip the plaster off and call a May election rather than squeezing every last drop of blood out of the economy and hanging on until November, but the sooner we are rid of this disgrace of a government the better. I suspect though, that the loons on the right of the Tory party will look at Reform party numbers and conclude that they lost the 2024 G.E. by not being right-wing enough, and in the aftermath we'll see some horror like Braverman or Badenoch lead the opposition.