Per Rectum (2005)

One day a young man named Gleb decides one day to abandon ... his gay orientation. With the help of ex-boyfriend Vladik, he tries to establish his new “male” life, but everywhere he stumbles on his own kind, or on primordially Russian homophobia, which ultimately leads him to a tragic and paradoxical ending in the form of death from above.

Unfortunately the movie Per Rectum is not yet available on HBO Max.