GillT57
Cameron has been accurately described as educated beyond his intelligence.
I'm not sure why anyone should be surprised by that. We keep asking an elite to govern the country and not a meritocracy.
Cameron is who he is in part because of who his parents were; Starmer because of merit. However, if you ask the voters which personality traits they want in a politician they, in the majority, go for the extravert and against openness to experience. We see them wanting someone who knows 'what the standards are', e.g., a suit, tie and standing up for the National anthem; such mannerisms denote a particular sort of background.
These outward shows win out over competence. Starmer seems to lose ground because of his competence. We saw May traduced for that characteristic. Vast swaths of the electorate have been prepared to overlook the incompetence of Cameron and later Johnson. To them, knowing the system the elite perpetuates scores higher.