Had the Queen Mother not been in the picture, how different would the relationship between the BRF and the Duke and Duchess of Windsor have been?
I think the Queen had no personal grudge towards them and only excluded them pressured by her mother.
I think we might have seen them invited to royal occasions a lot more often.
I think you are overlooking rather a lot of unpalatable facts about the Duke and Duchess of Windsor.
Adultery was a fast ticket out of Society, as indeed was divorce. That was just the way it was then, at that time, at that place. Wallis was. at that time divorced once, and while married to her second husband, was David's mistress. Worse, David was saying Wallis was going to divorce her second husband and marry him. You have to remember that during the early part of the century sexuality was considered a mental condition and many young, unmarried women were admitted to asylums forever for the sin of having a lover before marriage.
He did the unthinkable and put himself before his country. For that alone his own mother Queen Mary, while maintaining a degree of contact, would never accept his wife, the instrument of his downfall nor admit her into her presence.
His own father despised his heir and predicted he would ruin himself within a year. He knew the calibre of his own son.
David's actions immediately before and during the war were certainly little short of treasonous.And the truth of his behaviour was unthinkable, let alone unacceptable. Fifty years after the truth started to trickle out.
When Bertie was ill and near death, David was not averse to the notion put forward by some elderly and misogynistic statesmen, that he become Regent to Princess Elizabeth (for an unspecified time) as she was only a woman and far too young to rule. That information may have been buried in the archives for fifty years, but you can bet Queen Mary, (obviously the QM) Elizabeth and Philip knew about it.
QEQM did not rule Bertie, he was quite capable of making his own mind up, but I believe that having been ridiculed as stupid all his life, Wallis' continual insults about Elisabeth being a little housewife, calling her Cookie and other belittling insults and jokes at his wife's expense in society would never have endeared her to him.
Elizabeth married the Duke of York who had no prospects of becoming King as his brother David bein wildly popular and POW, they created their own very unfashionable, happy little family. Bertie himself never aspired to a greater public profile remembering the unremitting humiliation of his youth and ongoing political doubts as to his mental fitness. That is who the QM married and all the rewriting of history is not going to change it.
