I don’t think there was any issue w/ Meghan and her wedding tiara - there’s no credible source for that speculation IMO. Likewise the claims that she sought to overshadow Eugenie’s wedding, all of it utter click bait driven tabloid drivel, IMO.
My thoughts aren’t based on the series The Crown, as I haven’t actually watched it, rather, I have read a number of biographies about various members of the royal family. From what I read Margaret was very spoiled, especially by her father King George VI.
I know in British aristocratic circles the first born son is ‘different,’ they inherit the title & the estate, and that must be challenging to some siblings. It is the British way, but it seems so odd to me that by an accident of birth the first born son has a destiny mapped out for him and often the family fortune is his. The RF is different in that in aristocratic families the second son was expected to make his own way & had more freedom, whereas in the RF the second son is expected to forever play second fiddle to his elder brother, always give way to what big brother, the important one, wants, etc..
How successful the arrangement is seems to depend on the personalities involved, Princess Anne is a pragmatic sort and seems to do a magnificent job balancing her personal passion - horses, with supporting her mother and brother. But what would have happened if she had been told she couldn’t indulge her passion for horses & could only do Royal work? King George VI was shy and retiring and thus was happy to be a supporter to his brother David.
Prince Phillip struggled when the time came to give up his naval career & adjust to life supporting his wife so early, but he chose that role when he decided to marry then Princess Elizabeth. As I mentioned, Margaret & Andrew had their struggles.
Nevertheless, I wouldn’t be surprised to see some thawing of both Harry and William’s positions. Perhaps William will come to realize that yes, as future King, he gets the last word, but if he wants his brother to help ease his burden, he needs to bend a little. And perhaps Harry will realize that freedom has its’ price. We shall see.