I think it's a question of where the "trashing" you're talking about is coming from.
So we have two sides - H&M vs the RF. Just to be clear, I am not "for" either side and I did not form an opinion on MM from the first few interviews or TV appearances - other than thinking how lovely she seemed.
Back to the actual "trashing" and where it's coming from.
On the one hand, we get trashing of the RF from the very mouths and pens of H&M - the RF are unwelcoming and inflexible, Kate made me cry, they withheld a title from my child because of his race, they're stingy and won't pay for us.
On the other hand, we get the trashing of H&M, not from the RF but from the press and SM - M made Kate cry, H&M are grifters, they can't stop trashing the UK and the RF, they pull the racist card, whatever...
I know I know, you're going to say that the RF are complicit in what comes out about H&M even when it doesn't come from them - that they could deny or rectify if they wished, or even that they are planting some of these stories. But that argument has been hashed and re-hashed ad infinitum.