In a surprising rant on Twitter and Facebook, “Foxcatcher” subject Mark Schultz apparently blasted the movie and director Bennett Miller on Wednesday, citing complaints with how he was portrayed in the wrestling movie and threatening to damage his career.

Schultz, who was played by Channing Tatum in the Oscar contender, said in his rant that he “hates” Miller and accused the director of disrespecting him.

YOU CROSSED THE LINE MILLER. WE'RE DONE. YOU'RE CAREER IS OVER. YOU THINK I CAN'T DO IT. WATCH ME. — Mark Schultz (@MarkSchultzy) December 31, 2014

YOU THINK I'M GOING TO SIT BACK AND WATCH YOU DESTROY MY NAME AND REPUTATION I SWEAT BLOOD FOR. YOU AINT' SEEN NOTHING YET DUDE. — Mark Schultz (@MarkSchultzy) December 31, 2014

I BUILT THIS HOUSE AND I'LL TEAR IT DOWN. YOU THINK I CAN'T TAKE YOU DOWN COZ UR A DIRECTOR. WATCH ME BENNETT… http://t.co/wQSKgq9Pwz — Mark Schultz (@MarkSchultzy) December 31, 2014

I CAN TOLERATE A LOT OF THINGS BUT I DON'T TOLERATE DISRESPECT. WE'RE DONE BENNETT. — Mark Schultz (@MarkSchultzy) December 31, 2014

Everything I've ever said positive about the movie I take back. I hate it. i hate it. i hate it. I hate it. i hate it. i hate it. I hate it — Mark Schultz (@MarkSchultzy) December 31, 2014

I HATE EVERYTHING THAT SCUM TOUCHES. EVERYTHING!!! — Mark Schultz (@MarkSchultzy) December 31, 2014

I HATE BENNETT MILLER. — Mark Schultz (@MarkSchultzy) December 31, 2014

Sources associated with the film say they were caught off guard by Schultz’s recent turnaround, given that his previous comments have been largely positive.

Schultz provided a bit more context on Facebook, saying that there was an implication that he and his former coach John du Pont (played by Steve Carell in the movie) had a sexual relationship in the movie, which he called “insulting.”

Oddly, Mark Schultz’s previous comments on the film have been supportive, raising suspicion that his accounts may have been hacked. He praised Tatum’s portrayal of him in the past, saying he was snubbed in the Golden Globes nominations, and actively retweeted press materials and reviews of the movie. The wrestler also appeared at Cannes, where the movie premiered, to support it, and he is credited as an associate producer.

Schultz’s turnaround on the film began in mid-December, saying his portrayal in the movie is “inaccurate.”

#Foxcatcher couldn't have portrayed me more inaccurately if they tried. — Mark Schultz (@MarkSchultzy) December 20, 2014

For the true story (not the one the movie is based on…actually I don't know what story the movie is based on) read my book #FOXCATCHER. — Mark Schultz (@MarkSchultzy) December 21, 2014

Even so, as recently as Dec. 21, he praised Miller.

“Wrestling is extremely hard. It’s the hardest sport,” said “Foxcatcher” director Bennett Miller. How can you not love Bennett Miller. — Mark Schultz (@MarkSchultzy) December 21, 2014

Schultz released his own book in November, called “Foxcatcher: The True Story of My Brother’s Murder, John du Pont’s Madness, and the Quest for Olympic Gold,” which he says is the real version of what happened.

“Foxcatcher” is based on the true story of du Pont, a mentally ill, extremely wealthy wrestling fanatic who was convicted of the murder of wrestler Dave Schultz, portrayed by Mark Ruffalo in the film.

Sony Classics, the studio handling the film, had no comment. Schultz is currently out of the country and could not be reached for comment.

“Foxcatcher” hit theaters on Nov. 14 and is generating Oscar buzz, with Carell and Ruffalo nabbing Golden Globe nominations for their performances and the film being nominated for best drama.