I think I have Sunak worked out.
Tony Blair and Boris Johnson connected with people as politicans, whether one liked them or not, they had skills.
Gordon Brown, John Major and Keir Starmer were dull. Dull is fine, there are plenty of dull men in the UK, dull and functional is just fine.
I can't paint. I could buy a painting by numbers set and it would look exactly like I had painted by numbers and there would be nothing of any value.
Sunak is trying to be a politican by polticing by numbers, which is why he ends up with exactly nothing of any value. In fact at risk of being unfair on nothing, he is as far as I can tell a character made up entirely of nothing, an empty nothing.