Lol.......I can think of a handful of candidates that are not overly loaded in the brains department and managed to get in to one of these schools....Harry and William Edward, Andrew and Charlie......
Edward, I heard, secured even managed to get into Cambridge with grade D's.
These schools are very elitist and based on wealth and family standing to a large degree......the local grammars are far better schools and not full of pompous, spoilt, idiotic brats.
At least Prince Edward revealed his A level grades, which weren't actually as bad as they sound - these days 2 Ds would probably be equivalent to maybe 2 Bs and a C, as A levels were much harder then. Our former socialist prime minister Tony Blair got a place at Oxford, and has taken out an injunction against his school (Fettes College) ever revealing what his A level grades were. Prince William got ABC in his A levels, which doesn't sound too bad to me. Prince Harry I understand was allowed into Eton as a special case because having lost his mother so tragically it was felt that he should be with his brother at schol. Before Princess Diana died they had been considering Radley College for him, which is a school which takes a wide range of ability and does very well by all its pupils.
I am not related to any of these people, but I don't see why anyone should resent any of them except T Blair.