“Kate Middleton did modestly at A level”- that is complete nonsense. She got an A in Maths, and A in art and a B in English. There were no A stars in those days so she literally had just dropped one grade in English. That is far from doing “modestly”. She did well. It is potentially A star, A star and A in today’s currency. Before she got into St Andrew’s she had an offer from Edinburgh which is arguably the best uni in Scotland.
It is like a jealous person saying Kate Middleton isn’t beautiful.