Real reason Prince Charles was not fond of Kate Middleton at first
The grass is greener on the other side.
Despite the fact that most news is about the difficulties in Harry's relationship, Prince William did not have everything smooth at the time either. He had to go through dire stairs to be happy, opposing his closest people in the matter of his choice.
He had been dating Kate Middleton for almost 10 years. Only after the long test of their relationship did he make a proposal. However, according to the Showbiz Cheatsheet, this union also had opponents.
As royal biographer Sally Bedell Smith wrote, Charles always considered Kate an upstart who was trying to raise her own popularity at the expense of his son. As practice has shown, the future monarch was wrong.