Prince William believes that his estranged brother, Prince Harry, has been influenced too much by therapy.

Omid Scobie’s newest tell-all, “Endgame,” reveals that the Prince of Wales, 41, thinks that the Duke of Sussex, 39, has been “brainwashed by an army of therapists.”

Additionally, William feels “far from [trapped] in [the] system” of the Firm — despite Harry’s previous remarks suggesting the opposite.

Scobie writes that Harry relayed to a friend, following his father’s coronation in May, that he has come to accept his fractured family.

“Whether we get an apology or accountability, who knows?” Harry allegedly said. “Who really cares at this point?”

The Invictus Games founder released his bombshell memoir “Spare” in January.

In it, Harry recalls how William once asked to attend one of Harry’s therapy sessions “because he suspected I was being ‘brainwashed.'”

However, Harry noted that the Duke of Cambridge never even went to a therapist.

In the 400-page opus, Harry notes that his “worst fear” had come true.

“After months of therapy, after working hard to become more aware, more independent, I was a stranger to my older brother,” he writes. “[William] could no longer relate to me.”

Days after the release of “Spare,”, a source told the Independent that the royal family is afraid for Harry because they believe he has been “kidnapped by a cult of psychotherapy” and his wife, Meghan Markle.

“It is impossible for him to return in these circumstances” to the family, the insider said at the time.

The source also told Scobie that King Charles, 75, and his wife, Queen Camilla, 76, feel “trapped” in the Windsor clan.

“They really can’t engage because everything they say will be shared with the media. It is impossible to have a conversation or write a letter because of the risk that anything they say [could be] put in the public domain by Harry, potentially for commercial benefit,” the source added. “There has been a complete breakdown of trust.”