The Queen destroyed Margaret's life by not allowing her to marry Peter Townsend. She finally grudgingly agreed to a marriage with Tony Armstrong-Jones, which turned out miserable.
Camilla was not suitable for Charles, probably because a divorce would have been involved.
The only good thing that came out of that ridiculous taboo of divorce was forcing the Nazi, "Uncle David," (Duke of Windsor) off the throne.
Charles was not allowed to go to Eton, which was his heart's desire. He was forced to attend a strict, Spartan kind of school in Scotland, Gordonstoun, which his father had attended.
Finally, Harry was able to marry a divorced woman. I guess that's a kind of improvement. But in trying to do her "duty," Elizabeth made some very cruel decisions.