Predictable, if somewhat hackneyed response Bridgeit.
As I am not writing a university essay I do not have the references available, but they come mainly from articles and interviews from royal correspondents and retired members of the royal household, many in the business far longer than the younger generation of royals and with a huge store of practical knowledge. They could see danger looming early, and have much more inside knowledge than we do.
They were aware of Meghan's faux pas very early on, except that they were not accidental but deliberate. Not important in themselves, but an indication of how she meant to behave, as has been revealed. What sort of woman secretly registers a royal brand name before her child is even born? What sort of woman twice snubs the Queen's invitation to Sandringham, then very publicly flies to America to watch a tennis match.
It is not polite to intentionally defy convention when you move to a foreign country and marry into a long established and important family 'business'. If you do, then expect criticism.