However, their private feuding could have been kept private.
This was already impossible. Someone very close to the inside of that situation was leaking like a sieve. Stories were consistently appearing in the media almost all to Harry's, and particularly Meghan's, detriment. It's easier, rather than stab a 'guess' at who that was, to determine who it wasn't. Who in possession of all their marbles would actively pursue a highly damaging PR drive against themselves and seriously taint their own image in the process? No one.
The Daily Mail, granted, had a particularly vicious vendetta, aided by jackals the likes of Piers Morgan and Dan Wootton. But the Mail were the prime movers. At the same time as the 'Get the Bitch!' campaign was aimed at Meghan, stories were continually appearing in that paper painting other family members in such a saccharine light that even their own conservative, monarchy-supporting readership eventually grew sarcastic.
I'll hand it to Harry and Meghan. At least they had the courage and gumption to come out and say what they had to say openly, albeit it was nothing that people generally cared to hear. It's a marked contrast to the underhand method of whoever was getting into bed with the media to smear someone else, doubtless in return for the glowing, favourable (ok nauseating) coverage of themselves. In those circumstances, Harry and Meghan took the only course of action still tenable. They left.
The Windsor PR machine is slick. Reverence for that family is so entrenched (and misguided) that it doesn't seem to occur to people that maybe, just maybe, that couple might have some legitimate complaints.
As a republican since my teens I have no real interest in the Windsors, wouldn't support any one of them, and don't particularly follow their stories in the media. But I do sit up and take notice when wide-scale hate campaigns explode in the media against women (and it always is women), and I very much follow the kinds of attitudes which drive those campaigns. Meghan Markle isn't the first. And certainly, she won't be the last.