I always feel that art in general and acting in particular should make the audience a little uncomfortable, to slap them and wake them up.
Methamphetamine is a hideous drug. Meth makes a person become paranoid, violent, and aggressive - making them a serious threat to society and law enforcement. And maybe more importantly, meth users are a threat to their own children and families.
It began in mystery, and it will end in mystery, but what a savage and beautiful country lies in between.