My main complaint with Clint is that he enabled Josh's defiance far too much. I think that was a big reason why Josh became so careless with drinking and his health in general. There were times raising Josh where he needed to put his foot down and maybe things could have been different.
See, we can be in agreement about stuff, Clint fucked up. I'm not saying he fucked up when he got him the trailer home (although back when Cobra went to the second apartment I always defended a trailer home would have been fantastic for him then, he wasn't way too far gone and he was somewhat motivated every now and then), I'm saying he fucked up a long time ago, there's no doubt that in the last 2 or 3 years (maybe even more) only a complete miracle would have changed much.
A person like Josh needed way more supervision by someone with two braincells to rub together, even after becoming an adult.
You may temporarily solve the short-term drinking battle, but then you're left with a broken angry soul after you've ripped away the rare things that brought them joy and peace.
Honestly, I'd go with: "One problem at a time.".
We (Clint, the people around Josh, whoever) were not going to make him happy and change his life around while he was blackout drunk and high huffing duster, that's for sure.
You are not wrong, it would be hard, Josh had a lot of resentment, a lot of fear of the world, a lot of loathing for himself, it could maybe end in a similar outcome, but I wish there had been a strong attempt, even say 2 or 3 years ago in a nearly desperate hail Mary to do something.
Hell, I'd have liked a desperate attempt at anything as recently as whenever he moved to the trailer, that place saw Josh go downhill like crazy.
But you are right, the things that (in one way or another) were killing him were also the things that brought him anything close to joy: drugs, booze and the internet.