Looking at the past few years of H&M, I can honestly believe that the RF are extremely worried about H and have been for a long time. One of the things that came out of one of H's speeches was that he has been in therapy for many years now, predating the arrival of M and indeed William was apparently the one to encourage him to do that.
It's also become tragically obvious how fragile he is and consumed by the feeling he has no proper purpose in life. Again, that predates M and is connected to leaving the military. It was no secret that he desperately wanted to find a wife and have a family, another way to find purpose and then M appears into his life.
It's no wonder that William was concerned and asked him if he was rushing things. W&K would have known about his vulnerability and worried, plus he really did rush into marriage. I also now think that after meeting M and getting a sense of her, W&K must have quickly worried about her dominant personality and how far gone for her H was. I wonder if they were worried about him having an unhealthy dependence on her so quickly.
I'm not trying to suggest that H is some poor victim, he's had a life of privilege, protected at every turn and given the freedom to follow charitable interests that he wanted and carve out the role he wanted (W had less freedom in that respect), so I think he has walked away from what could have been a successful life of duty and reward amongst family and friends, with a public that really liked him. In many ways he had his destiny in his own hands with advantages we will never experience but he walked away and complained about it all.
Anyway, just some ''lockdown'' musings on the whole sorry business.