The legal papers linked at the start of this article make for a great read. The Sacklers are monsters who got people hooked on ever increasing doses they couldn't quit. It's not just about diverting and using the drug recreationally; most of the addicts started out with legit pain needs. Thousands of them are now dead.
It is easy to scapegoat the founders, but I know quite a few people, including myself, where OxyContin was the only pain reliever that really worked. In my case, took it after surgery. Not sure that Purdue Pharma is any worst or better than other Big Pharma.
It's precisely because this was directed at legit pain patients that it is worse. The opioid crisis wasn't caused by recreational drug users stealing grandma's pills. It was caused by the very rich people who ran Perdue and their never-ending quest to increase people's dose and number of refills.