I doubt members of the royal family have ever been called mongrels like Meghan has. I've read that descriptor of Meghan on many comment sections of American newspapers and The Daily Mail.
There's always a learning curve when members of the royal family hit a rough patch. The RF have had so many centuries of protocol it's leached into their DNA. From the time they wear their short pants and Fair Isle sweaters they know they are different. Even now, Andrew seems to think he's above the fray, when it comes to his dalliances with young women and his friendship with Jeffrey Epstein.
But God forbid, when Meghan who is bi-racial has messy hair (translation: frizzy) she is excoriated by the public. And if she wears a dress that accentuates her figure, she's lambasted as "Kardashian-esque (translation: trashy).
Here's examples of the hypocrisy of the press comparing identical situations regarding Kate and Meghan.
15 Headlines Show How Differently The British Press Treat Meghan Markle Vs Kate Middleton