It's already been demonstrated that she was treated very differently to Meghan, and it would have continued as such, just like with Sophie.
The tabloids are racist af, there is no denying that.
The only time they were positive about MM was the run up to the wedding, because the while world had it's eye on the UK then, and there was no denying her credentials when they had to introduce her.
Harry was not rude to the journalist, it was the other way round. She knew very well, they are not supposed to shout at royals during visits.
Kate had a few jokes on class, Meghan had to deal with both class and racism. Which is insidious, because you cannot change your race.
I don't know how you can say Meghan was never really in, when she attended all her royal duties, and did some research and helped with the aforementioned capsules, cookbook etc. I don't know why you think she would not open a leisure centre or whatever, if anything she would probably find ideas for that centre to financially thrive and do more for it's community based on her past endeavours. She had seemed to have understood the brief very well.
And no the brief is not that you must endure racism, lies and over the top unjustified criticism. Nor should it be.