I think that when two damaged people end up together, it's a bit of a recipe for disaster.
Her childhood certainly wasn't the solid, stable (and possibly slightly dull) childhood that Catherine had.
In all the press there are considerable gaps in Meghan's story that just don't add up. Blended families are difficult at the best of times, but clearly there was never any love lost between Meghan and her half siblings. Her mother is around now but she grew up with her father.
The press would be all over that for a celebrity, but seems to have stepped around those issues for a former member of the royal family.
She may be intelligent but she cannot read a room. The things that come out of her mouth sometimes are mindblowing.
Then you have Harry, who despite the intense therapy he says he had, has never been able to put his mother's death and the notion of being the spare to bed.
I think they brought the worst bits out in each other and couldn't see that the moves they were making had disaster written all over it.
Prince Phillip hit the nail on the head when he said the crowds show up for the job title and not the person who holds it.
I think if you can't see that, then it quickly becomes a very heady thing.