The 26-year-old has acknowledged the feud between him and his famous family in a post on his Instagram story.
He claimed his parents had been controlling narratives in the press about his family and tried to "ruin" his relationship with his wife Nicola Peltz Beckham.
"I have been silent for years and made every effort to keep these matters private," he said.
"Unfortunately, my parents and their team have continued to go to the press, leaving me with no choice but to speak for myself and tell the truth about only some of the lies that have been printed.
"I do not want to reconcile with my family. I'm not being controlled, I'm standing up for myself for the first time in my life.
"For my entire life, my parents have controlled narratives in the press about our family. The performative social media posts, family events and inauthentic relationships have been a fixture of the life I was born into," he said.
"Recently, I have seen with my own eyes the lengths that they'll go through to place countless lies in the media, mostly at the expense of innocent people, to preserve their own facade. But I believe the truth always comes out."
Nicola, who is the daughter of American billionaire businessman Nelson Peltz and former model Claudia Heffner Peltz, married Brooklyn in 2022.
He is the eldest son of the celebrated former England football captain and his Spice Girl turned fashion designer wife.
The couple, known as Posh and Becks, are also parents to sons Cruz and Romeo and daughter Harper.
"My parents have been trying endlessly to ruin my relationship since before my wedding, and it hasn't stopped," Brooklyn said.
"My mum cancelled making Nicola's dress in the eleventh hour despite how excited she was to wear her design, forcing her to urgently find a new dress.
"Weeks before our big day, my parents repeatedly pressured and attempted to bribe me into signing away the rights to my name, which would have affected me, my wife and our future children.
"They were adamant on me signing before my wedding date because then the terms of the deal would be initiated.
"My holdout affected the payday and they have never treated me the same since," he said.
"Even my brothers were sent to attack me on social media, before they ultimately blocked me out of nowhere this last summer."
Brooklyn went on to claim that his mother "hijacked" his first dance with Nicola and danced "inappropriately on me" in front of their guests, adding that he had never felt more "uncomfortable or humiliated" in his entire life.
He also alleged his wife had been "disrespected" by his family and she was not invited to his father's 50th birthday party.
"My family values public promotion and endorsements above all else," he said.
"Brand Beckham comes first. Family 'love' is decided by how much you post on social media, or how quickly you drop everything to show up and pose for a family photo opp, even if it's at the expense of our professional obligations," he said.
"The narrative that my wife controls me is completely backwards. I have been controlled by my parents for most of my life.
"I grew up with overwhelming anxiety. For the first time in my life, since stepping away from my family, that anxiety has disappeared. I wake up every morning grateful for the life I chose and have found peace and relief.
"My wife and I do not want a life shaped by image, press or manipulation. All we want is peace, privacy and happiness for us and our future family."
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