The city I live in is crowded with heroin addicts and none of them look as cool or sexy as in this movie. And they're definitely not jacked like the one guy is. And they never wear sexy short-sleeved clothing because they want to hide their track marks. And they don't have sexy haircuts, or haircuts at all. Instead of cool music and fun and thrills, a more realistic movie would feature a scar-covered homeless person with tangled hair locking himself in a smelly public bathroom stall for most of the day, because that way no one will disturb his high. Probably the most unrealistic thing about this movie is a heroin addict being disgusted with a filthy public toilet.
I'd probably be willing to forgive that if the movie was really good, but it's just another failure of a 90s Tarantino rip-off, that only barely gets by on visuals