This is all so sad IMO. We can't forget that at the hear of this is a family that is in effect splitting up. I'm sure this is so painful to HM, Philip and Charles - to see someone they love so hurt and rejecting everything they have worked so hard for and hold dear.
As ever there are those on either side who either see no fault at all in that the Sussex's do and those who only ever see fault. Those aside, more interestingly are the majority of people who are in the middle- who are prepared to give them a chance but who don't give them a free pass when they mess up. The reality is (IMO of course) that no one really knows what they want, they say they find their roles in the UK unbearable and untenable but just when you think they would say they want to live quiet lives away from the public and media they actually say they want to go to North America and in effect do what they are doing now. That doesn't seem to be solving anything other than giving them the freedom to use their royal role/title to do as and what they please including making money from it. I honestly 100% believe apart from those who will never see good in them, would happily have accepted that given how unhappy they are they should be allowed to go into private life, possibly eve taking on jobs (Harry maybe with an NGO or furthering his work with Invictus, Meghan could even go back to acting and just hold off on too many personal/family based interviews) and people would pretty much be okay with that.
As ever with the Sussex's the problems lie not necessarily even with their intentions (though at the moment they leave plenty of unanswered questions) but with the way it is all handled:
Why return home just to announce it? The Canada House engagement was apparently set up last minute so seems like it was almost solely to ensure plenty of attention on them before announcing, why come home to announce when really there is no need?
Why announce it after being told not to by HM? Yes the Sun may have leaked a version of their plan but they can't hate the media attention that much they would throw the monarchy and Harry's family under the bus just to stop the Sun from looking right surely.
Why put up your own website stating things that have not been agreed by the Household and HM? Honestly the only reason I can see for doing this is to make it harder for anyone not to give you what you've stated because doing so would be clearly evident.
If the media are too much and your tired of it (which most of us can understand) why make an announcement you know will create even more fuss and attention which says you will still continue to do so much that will inevitably create even more media attention.
If you want to still carry out duties for HM how can you honestly expect to be allowed to make money for yourselves using your titles and fame and on top of that do these public duties without using the well established Royal Rota media protocol that allows access to these public engagements by main stream media. How can you expect to handpick the media outlets that cover you. To be honest the issues with the media have not from what I can see been with the coverage of your public visits and duties. How will any of this stop the DM or other media they dislike or distrust from writing about them anyway?
If they wanted to retire from public life everyone would accept that, its that they want to effectively still be working royals as long as they can do the work they want,where they want, to the media they want, with the funding they want, seemingly returning when they want to do what they want.
I don't really understand why they need such a dramatic announcement, why say anything at all right now? They could have stayed in Canada longer, Harry could have returned to the UK for his engagement next week, then returned to Canada saying they were still enjoying some time away from it all to cherish with Archie. There was plenty of time to work out a solution surely? Unless there is a pressing reason why they want this settled so soon, I don't see what would change which meant they couldn't wait a few more weeks for an agreement with the Queen and Charles? What does announcing this now achieve? They could have used the time to discreetly put things in place so that when it was announced they had a more permanent overseas home set up or at least lined up.
There is no point keeping people doing something they are unhappy with so ultimately of course they should do what makes (or is likely to make) them happier but I'm not sure how they can just simply expect Charles to keep paying them as before and to in time start making their own money possibly from their positions.
It's sad but for the sake of a fresh start and happiness for all I really thing in some ways they need to treat this in some ways as a divorce, make a clear finance structure which allows everyone to know where they stand. A lump sum to buy a house in Canada (or maybe Charles even just buys it for them) to show he is supportive, hopefully somewhere with enough space to accommodate a small security team to prevent the public paying for renovations to house them and a smaller than now personal allowance (likely still 6 figures)
It really does seem to me that Meghan and Harry are in a poor place mentally where they see betrayal and deceit around every corner. Hopefully some time out will help them regroup and feel stronger again.