Although Charles deeply loves his son, the King finds it hard to let go of his resentment towards Prince Harry, according to royal biographer Christopher Andersen.

Allegedly, Harry’s critique of Camilla further complicates matters. Sharing his insights, Andersen stated: “I think people have to realise that the one thing that Charles finds unforgivable is criticism of Camilla.”
Emphasising Harry’s sentiments towards Camilla, Andersen said,”Prince Harry made it clear that he felt she was the villain in the piece.”
Writing in Spare, the Duke of Sussex dubbed Camilla “the villain” and wrong at length about their strained relationship.
“I think that still bothers the king, and I don’t know that it will be easy for him to [forgive]. I don’t think they’ll ever forgive Harry for that.”