If this is his complaint (entirely reasonable), he needs to take it up with his parents. Probably what he's been privately and publicly calling for, for years. But he's got nowhere with them because he's been told it's part of the deal: royal privilege in return for reduced privacy. He availed of the privilege, now wants recompense for the reduced privacy too.
It's like these parents on TikTok etc who do reels (or whatever they're called) using their children as unknowing bit players. Do those children grow up to sue TikTok, or to have it out with their parents?
More, though, is that yet again he's showing with his own words from his own mouth that he doesn't think he needs to take responsibility for his actions. That this is STILL someone else's job, to sort things out for him.
Suggesting it's criminal to play on the challenges and mental health struggles he's had for pecuniary advantage is gobsmackingly hypocritical. I can tell him what really should be criminal: living a cocooned life of rarified luxury where you can flunk out of one of the best schools money can buy (which you were only allowed entry into because of who you were born to) after odiously arrogant and enabled behaviour, but still avail of luxuries unimaginable to 99.9% of the world's population, and as a grown man go on to "market" yourself and your wife with your "truths" to people with REAL challenges and who knows what mental health struggles and how much or little money, for clicks and book sales and Netflix viewing numbers, in order to further feather your own already plush nest. The greed, venality, dissembling, double standards, arrogance, short sightedness, hypocrisy, stupidity and lack of self-awareness is repulsive. He's doing his brother and SIL a huge favour with all this talking, because next to him they look like angels.