If Harry wishes to have his father and his brother back, whatever that means, he needs to apologise to them. Privately. Then he needs to shut up.
This a family disagreement but also a business fall-out, resulting in remaining members having to take on more duties.
He and Meghan have talked endlessly about their problems so we do know a great deal about them, more than we do about our neighbours, I suspect, and as they have made their private affairs public we are all entitled to express our opinions.
I certainly despise people who, having fallen out with their family and friends for whatever reason then talk endlessly and publicly, even on social media, about what should be personal and private matters. The royal family have a right of reply but choose not to sink to the level of their accusers. Harry and Meghan have not only used all the media resources at their disposal, they have used them as a means of earning money, and that is despicable.
Neither of the Windsors carped about their treatment in the way Harry and Meghan have, even though the Duke was greatly dismayed to discover they would not be able to live in England following his abdication. H & M chose to leave, they were not banished.