The new Hulu drama “Dopesick” constantly deploys the trusty time stamp, telling you in what year a scene is taking place, because it jumps around like a hyperactive tree frog. In other series, this might feel chaotic or like lazy screenwriting, but here it feels necessary: the sprawling tragedy of the opioid crisis has unfolded over so many years and with so many bad actors as it has decimated and destabilized American lives that it would be otherwise impossible to keep it all straight. T...