A.D. Amorosi “The Idol” has been the TV season’s spite-watch de rigueur – a mess of untenably dated misogyny, homophobia, angry interpersonal sexual violence and traumatic hair styles, all of it was justified in the service of reminding the world: Never trust a dude with a rat tail. However, for all of the menacingly off-putting storylines, visceral physical assaults and mawkish dialogue that made up “The Idol,” the show’s icily epic music — made by its creators and actors, in and out of character — has been mesmerizing… thrillingly so, even, through the program’s bad, brief run. The music was initially broken down as a series of EPs released between June 9-30, and now those weekly teasers are captured in full on “The Idol (Music from the HBO Original Series),” a soundtrack that stands as a far more rewarding and cohesive document than its televised counterpart.