Prince Harry is allegedly trying to ruin the monarchy, according to one royal commentator.

Daily Mail Diary Editor Richard Eden, a regular guest on Mail+'s royal TV show "Palace Confidential," appeared in its recent special episode, joining host Jo Elvin and Daily Mail's Royal Editor Rebecca English. During their chat, Elvin mentioned Eden's previous comment that he thought Prince Harry was out to destroy the monarchy when his memoir "Spare" was still coming up. The host asked Eden if he kept the same view nearly a year after the Duke of Sussex's controversial book was released.

"Very much so, yes," Eden replied. "I think, you know, from the moment they quit royal duties and what followed, I think it became clear that their motive was to damage the monarchy as much as possible, damage his brother as much as possible. We saw that from the Oprah Winfrey interview, you know that he really was, we've still seen the repercussions of that later in the year, and that followed through in his book."

In the same interview, English mentioned that some people told her Prince Harry's book "won't be as bad." But she actually thought it was worse because she found it "so nasty, so poisonous, so vitriolic" and "so unnecessarily spiteful."

In his memoir, Prince Harry went into details by sharing his physical altercation with Prince William and Kate Middleton's row with his wife, Meghan Markle, over the bridesmaids' dresses.

Eden agreed with English's observation, saying, "And I think, following on from what Rebecca said, I mean what was so damaging about the book as well was, you know, it was so well-written. It was so unprecedented." 

"We've never had a book like this to hear in the words of a senior member of the royal family. And, you know, let's be clear: Harry did not write it. What Harry did was record hours of interviews, being interviewed by a very skilled ghostwriter, who then wrote this beautifully written book to be as damaging as possible, and I think that's part of [why] it sold very well in the way that any book by a senior member of the royal family would sell well. But it did do terrible damage," he added.

In an interview with The Telegraph before the official launch of his book, Prince Harry seemingly blamed his family for their feud, saying that "it was so avoidable," but "they couldn't help themselves."

He added that he felt a "responsibility" to reform the monarchy. He also demanded that his family apologize to his wife.

"I wish you'd actually sit down with me, properly, and instead of saying I'm delusional and paranoid, actually sit down and have a proper conversation about this, because what I'd really like is some accountability. And an apology to my wife," he said.