Let me try and guess the plot. Aspiring singer has rough childhood (some close relative probably dies too), grows up wanting to be a singer, begins his career singing in shitty bars until he gets discovered by some producer, finds a girl, marries her, becomes famous, begins to cheat on his wife, becomes addicted to drugs, insert random flashback of his fucked up childhood, sings for Apollo Creed in Rocky IV, breaks up with his wife, destroys random hotel rooms and bathrooms because he’s still addicted to drugs, another random flashback of his fucked up childhood, finds another wife, re-marries, tries to get off drugs, succeeds, sees the light, gets cured of the past. The End.
Ahah the script ignored then the violence against his wives. And if he was under arrest even recently… So did he see the light really ? Hum, maybe only through music.