"Bullying" is such a modern offence. When you asked Diana, she was bullied by the "grey men" while they would nowadays accuse her to bully her staff. IMHO bullying is very often claimed in working relationships, where the people working together were forced to do so. Meghan on coming in had to accept the people already there and they had to accept her as the future princess Harry. When in that situation a cultural difference in expectation of behavior of principal/staff happens, it is bound to lead to situations that need adjustments. From both sides!
On the one hand there are trusted Royal servants who had taken on the job even though it is not well payed because they belief in the monarchy. They have been selected for their service due to their qualifications, have been entrusted with doing Royal = important stuff, been encouraged to follow the rules and revere "Their Royal Highnesses".
Now Harry presents them an energetic, self-confident American as his new Duchess and their boss. A lady who knows nothing about the workings inside the firm. probably Harry told her that the firm is "traditional" which to Cinderella Meghan meand: they do what I want because I am their new princess. For an American "becoming princess" means something very different than for an European institution steeped in history.
Remember all the gossip when Mary of Denmark allegedly went to "princess school"? I do and think she did the right thing. All young princesses of former times were taught what to expect when they married into a different House. The world still remembers Marie-Antoinette as the young Crown Princess who was forced (via her imperial mother in Vienna no less) to say one sentence to the king's mistress: "There are many people today at Versailles". First and last sentence ever to Mme Du Barry but the king and court were content, all was as it should be, the institution worked. That was 250 years ago (it happened in 1772) but there still is talk about it today.
So I guess we have to accept that people will talk about Meghan as well...
Meghan was untrained and obviously did not see the need to receive further training. Or did she, but, like Marie Antoinette, listened to the wrong people who enjoyed her problems secretly? In Versailles, it had been the king's daughters, the Royal aunts of the Dauphine's husband... Who might have given the wrong advice to Meghan?
I think we all agree that it was difficult for Meghan to enter the "court" of her husband and his brother, difficult for those people working there as well. IMHO these problems should have been worked out behind closed doors, not with the tabloids hanging on every claim made against Meghan. My position is that if I don't have all the information, I absent myself from posting opinions, I only think about possibilities of what might have happened. Some sort of speculation, yes, but IMHO better than to judge Meghan for things that might never have happened or not happened as told.
Otherwise it might happen again what happened in France: the Austrian queen Marie Antoinette become such an object of hatred, she was condemned to death and executed. No, that's a joke but reading some of these posts and thinking about what was said about poor Marie Antoinette, one might get the idea...