The only sane comment here. It's laughably ridiculous to call for retribution against a single family as if they were personally responsible for every overdose the country has seen.
Like I said above, I think it would be extremely shallow thinking to claim that there is a single reason.
If I were to pick a leading difference, I would say that the US has embraced trained consumerism to a greater degree than most European countries. As such, the idea that a simple pill/product will make a problem go away has more traction, both with prescribers, patients, and abusers.
You see this difference manifest in many cultural and social forms, where people in the US are especially prone to "quick fix" marketing and products that offer escape and excitement through consumption.
This is one thing that leads into higher rates of substance abuse in the US than Europe. For example, the US has a higher rate of alcohol use disorder than most European countries, despite most of the countries having more permissive laws around alcohol and more consumption of it on average.
Real progress would involve systemic changes to the treatment and causes of drug addiction, as well as medical treatment philosophy.
To hang the opioid epidemic on perdue is a gross oversimplification, essentially a scapegoating of a multifactorial problem. Perdue sold the same pills in Europe, but the US has an overdose rate 2,000% higher.