I wouldn't be able to name my sources, only that I live in an area that has lots of members of the RF and things tend to leak quietly, and always have done. This came up before christmas.
Harry asked the Queen for help because MM was struggling so much living in the UK and was not happy, the marriage was under a great deal of strain.
Anyone will tell you that breaking into English aristocratic circles, and understanding how they work was always going to be an uphill struggle for someone like Meghan who simply didn't understand them (or try to). I imagine she thought she could breeze in and be adored, but it doesn't work like that. It was one thing to marry PH quite another to convince those in royal circles that she was up to the task or fit to be a duchess, she would have felt very much the outsider, at the polo matches, shoots, hunts etc.
Although I believe her to be calculating and manipulative, I also understand why she may have struggled with it all, and it is entirely possible far from being over confident, she was out of depth much of the time here, her own values and thoughts silenced. I don't believe this situation is entirely her fault, she was never going to enjoy the hunting given her feeling on animal cruelty, the braying polo matches, the old traditions and the endless dull duties. It was never going to work.
No doubt she will be back in her happy place in Malibu, but it comes at a price for Harry. A hefty sacrifice that he has made, and one that he now has to carry alone.