This is a tragic tale of why you should never, EVER leave out your mommy-obsessed. impotent, obnoxious, porcine bass player when rounding up needy groupies to have casual sex with.
This is a hard film to watch. Not because of the violence against women. Yes, there is plenty of that, on top of presenting women as idiots willing to be treated like trash just to hang out with a go-nowhere rock band whose music sucks the muffler of a poorly running Edsel. But because...well, hell, folks, it's kinda boring and meandering.
Oh, and if you don't want to have a clue about the ending of this thing, don't watch the final seconds of the trailer.
If you DO watch it, look for Dave Friedman in a bit role towards the end of the film. Yes, he has his signature cigar.
By the by, this trailer is seriously NSFW. You've been warned.