Griffin O'Neal: 'My Whole Family Has Been Destroyed to Smithereens From Addiction and Alcoholism'

Griffin O’Neal, the son of actor Ryan O’Neal and brother of Tatum O’Neal has struggled for years to break free from one of the most famously dysfunctional families in Hollywood.

“My whole family has been absolutely destroyed to smithereens from drug addiction and alcoholism,” says Griffin, 50. “The common denominator is drugs and alcohol and depression and it’s a never-ending cycle. I had to walk away from all of it. I’m done.”

Ryan O'Neal Is a Great-Grandfather

You know that handsome young man from Love Story? He’s a great-grandfather now!

Ryan O’Neal proudly shows off the famous Hollywood clan’s latest addition – dashingly decked out in a straw hat and shades – in holiday weekend photos posted on Twitter and Facebook.

“Had a wonderful day with my new great-grandson Sidney,” O’Neal, 72, writes. “Happy #MemorialDay to all!”

Griffin O'Neal Speaks Out About Family's Troubles

The drug arrests of Ryan O’Neal and his 23-year-old son Redmond at their Malibu home are just the latest chapter in a tragic saga, the actor’s other son Griffin O’Neal tells PEOPLE.

“It’s a very screwed-up family,” says Griffin, 43. “If you want to be emotionally healthy and strong, you’ve got to get out …. It’s a truly sad situation.”