As a random member of the public who's not overly interested in MM but very interested in who holds power in the UK (RF, govt, media, corporations, rich people lurking in the shadows, cultural influencers from academics to celebrities) my impression of MM is that she's all about her own image. She is, essentially, that teenage girl who practices her Oscar acceptance speech in her bathroom mirror aged 15, but 20 years older and with more sophisticated means at her disposal and, since marrying H, an audience. That she hasn't actually earned that Oscar, and jumped straight into humble acceptance of her exceptionality, doesn't seem to be a problem for her.
I suspect the bit about Eugenie and Beatrice being paid royals was a riposte to H&M being disallowed from being half-in/half-out royals (she ignores their consistent public veneration of the RF as an institution and as their family). Exaggerating the impact of her wedding on the UK's GDP is self-aggrandisement (or gullibility) on an astonishing scale.
On marrying H, she was catapulted into publicity and monetary heights which must have blown her mind. She doesn't seem to have had any support or help in dealing with that: it looks like H is clinging onto her for dear life, she has fractured family relationships, her friends seem to have vested interests, and all her advisors are paid by her. She has no steady hand guiding her. It's tragic.
On the question of who holds power in the UK, H's words yesterday apologizing to young people for not having made the world right for them (can he hear himself?!) were notable. I think he got away with it because the awards were in his mother's name, and he made a point to reference that he and William were behind the message. It was a nuclear family thing, not a royal family thing. He absolutely does not have the authority, as the monarch's grandson/son/brother and the duke of sussex, to go rogue and issue an apology for Britain's racist history and the part the royal family has played in Britain's current race problems. I'm sure the men in grey are watching him very carefully.