Things went downhill for a long time.

I did refrigeration at a factory. I found out shortly after I was hired that the factory used to belong to another company, and was phasing out old company's policies. Things got worse, but it wasn't too terrible. I was paid well, worked decent hours, had a lot of freedom. But one of the leads of our team started developing a drug habit. Got addicted to painkillers, and when those started running out, he got addicted to alcohol. Started showing up to work drunk.

One time, on a weekend when he wasn't even scheduled to work, he decided to drive a forklift through the boiler room. He hit a steam pipe, which started leaking. He also hit the deaerator tank and an air compressor. The damage was pretty bad. He was told to get a drug test by the manager on duty that weekend, so he called his own manager to avoid that. For some reason, on Monday, the on duty manager got fired and not the drunk guy who caused all the damage. I reported this all to HR, but they did nothing about it.

Years later. Same guy kept causing incidents (usually on weekends when he wasn't scheduled to work; I suspect he was digging through scrap bins to pay for his drug habit, which were kept in the boiler room) and his manager kept protecting him. Guy did nothing useful, so I have no idea why the manager kept protecting him (maybe sharing money from the scrap?). I figured it was time to go if these two were able to keep fucking things up. We'd eventually have an incident where people died, and I didn't want to be there for it.

Couple years after I quit, the drug addict OD'd, and the manager was forced into early retirement, so I guess the problem is resolved. Not that I'd ever go back.