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Kurt Cobain: Montage of Heck has a 98-percent Fresh rating on Rotten Tomatoes, but one critic thinks the film is “total bullsh-t.”

That’s what Buzz Osborne, founding member of the Melvins and Cobain’s long-time friend, wrote on the blog The Talkhouse in a new review of Brett Morgen’s lauded documentary.

“First off, people need to understand that 90 percent of Montage of Heck is bullsh-t. Total bullsh-t,” Osborne wrote. “That’s the one thing no one gets about Cobain — he was a master of jerking your chain.”

Osborne, who went to high school with Cobain, said key sequences in the film — like one about how Cobain tried to commit suicide on train tracks when he was a teen — are not true. He also questions a lot of the stories Cobain’s wife, Courtney Love, tells in the movie.

“For instance, she’d have us believe that Kurt tried to off himself when she’d only thought about cheating on him?” Osborne wrote. “Wow. That’s a whole lot different from the stories he told me in regards to Courtney’s behavior — and this was well before he ended up dead. And that’s just one example.”

Montage of Heck debuted at the Sundance Film Festival in January and aired on HBO in May. The movie uses Cobain’s diaries and home movies to tell his story, from birth to death by suicide at the age of 27.

“I was cynical,” Morgen told EW about making the film. “I didn’t know going into this if there was anything left to be said or to be seen. But this story wasn’t about Kurt desiring to be famous and then once he got there kind of rejecting it. It’s really a family-­origin story, and it’s about Kurt’s drive and determination to find the acceptance and the nurturing he so desired as a child. It’s really just about a boy named Kurt.”