I do not for a minute think this is all Meghan's doing, Harry was clearly restless and trying to figure out his role. He could've obviously left on his own terms in a different way. However I am sure there was a lot of pressure bearing down on him in terms of duty and what was expected of him. There did seem an attitude within the RF that although Harry was not a direct heir he should make himself available to serve the Crown. You would think the Queen and palace advisers would become more understanding and imaginative when it comes to the also-rans within the RF system. We all know they live a life of utter luxury without a financial care in the world but they still need to feel they have a purpose in life. Princess Margaret and Princes Andrew and Edward all floundered with a lack of a role.
Harry was adrift ever since he left the army. There seemed to be the assumption that he couldn't serve the Crown and stay in the armed services but I think that was probably a mistake. The army seemed a great fit for Harry. He is not intellectual but was able to learn a lot of impressive skills such as flying Apache helicopters and thrived on the camaraderie. The armed services are also such big supporters of the Crown and the RF. Harry seems to struggle in giving his life structure which the army imposed. If they had been able to carve out a role for him where he was serving in the army full time while connecting with civilians and veterans in some way that may have worked. Maybe he was tired of the UK but in their statement from January H & M said they wanted to spend 50% of their time in the UK.
Unfortunately his privilege may have blinded him to how much amazing opportunity he had access to. They was no doubt that compared to the rest of us he was "spolit". I think it prevented him from really clearly visualizing where he wanted to go in his life and what he wanted to do. I am sure he would've hit a brick wall in the palace if he had suggested he would go and run safaris in an African nation. Of course he could've blazed his own trail but didn't have the strength of character or an understanding of what he wanted his future to look like to be able to fight for it.
Meghan gave him a concrete route out and obviously they believed they had figured something out which seemed plausible. I am sure they could have taken another path of some kind which would not have involved burning bridges on the way out. That is the tragedy, their hubris may have cost them a life they would have infinitely preferred.
However, despite all the hand wringing on here, if they really crash and burn in Hollywood I do think the RF would always have them back. Harry is still the son of the future King and I am sure PC would want to know they were safe and sound back in the royal fold than struggling in a cruel world. Whether Meghan could stick being back in the UK remains to be seen. The sticking problem will be the exorbitant cost of protection and whether that can be covered without help from PC. They will really struggle finding that cash if they are supposed to be raising money for others.
To me, the two camps of Pro and Anti Meghan are misleading. Clearly the Brits are fascinated by her 
the amount of people that make comments such as "why don't they just go away" "I don't want to hear any more from this pair" etc. etc. is hilarious when those same people are obviously avidly reading everything about them. They have become a Soap Opera that the Brits are still much more obsessed with than anyone else.
**oops this became extremely waffley! 