I'll take the producers word that Jonathan Agassi was a successful gay porn star. I do not claim to have any great expertise in porn stars, gay or straight.
This documentary was filmed over eight years. Jonathan divides his time between Israel and Berlin. He is close to his mother, his father abandoned them when he was young.
Director Tomer Heymann reveals a young man in turmoil. Jonathan lives a destructive lifestyle, taking crack and needing to inject his penis to keep it up for sex scenes.
A porn producer lets slip why Jonathan's star in porn faded quickly. He would not take advice. Instead Jonathan went for more tattoos, cut his hair shorter and shorter and bulked up his muscles with steroids. Jonathan goes into escorting as he ceases being the main star in porn movies. Other actors take the limelight and win awards.
This is no surprise, porn is an industry that physically and mentally screws you up. It is well known. Jonathan also seems to have daddy issues. Especially by the way he abandoned his family and also tried to force Jonathan to go straight. A young Jonathan knew he was gay but was also conflicted about gender.
The documentary implies that father and son have been distant for years. However his father lives in Berlin so it is hard to believe that they have not been in touch, even though Berlin is a big city.
It would had been nice if the documentary had a timeline. What we see is someone on a downer because his father seemed to have lied to him about why his marriage broke down. There is a scene where Tomer intervenes as Jonathan has a bad reaction after taking drugs.
Jonathan Agassi is now off drugs and works in a store. He turned his back on porn. I am not sure if he is at peace though. The documentary suffered because at times it looked to be too obviously manipulated.