On the Camilla point that she "sacrificed him on her personal PR Altar" I didn't get it, so I did some googling. I think the whole thing is not about Meghan, its about when Harry was young. He's just really crap at being clear and on message so it comes out in the midst of his other angst and people think its about Meghan.
Diana dies in 1997, KC and Camilla go public in 1999 and marry in 2005 so presumably thats when she was trying to rehabilitate herself to the British public, which also ties into Harry's teen years so the stories of drugs, Nazi costume, crap A levels and the rumour that his teacher helped him on his art one, etc. Presumably he is saying all those stories were leaked to the press to encourage them to be more favourable to Camilla at the time? This is the time of Mark Bolland and there is the documentary Reinventing the Royals about that period and what he did including allegedly leaking the details of William's first meeting with Camilla.
So yes, I guess Harry has a point and is holding the grudge from that time - which is understandable its a hell of a betrayal that your teenage mistakes get front page news in order to protect your father and his girlfriend. For those interested this is a internet rabbit hole that you can spend hours in (and I wonder if Harry has done that, almost like picking the scab?)
From then on he probably second guesses everything that happens, and assumes the same game is being played but this time its Meghan who is the bad guy. Again, all plausible and plays back to the covering up other stories of the RF like William's alleged affair, PA. Afterall in he can't understand why the woman he loves, isn't being praised in the press but instead being painted like a villain. I suspect he is too self absorbed to notice that other new female members of the family have also been shredded by the press in the past, like a right of passage. And the more they kick back, the more press vilify them.
In the end of my googling, I came to the conclusion that like all of it there is a nugget of truth in what he says, his problem is its hidden behind petty points like frozen penises and bedroom size, as well as big issues like racial bias in the press. Not only has his therapist not served him well, neither have his comms people in terms of getting the real crux of his issue across.