In terms of the broader picture, the army and the base medical were focusing on the symptoms of Stuart's PTSD, i.e., he was drinking himself to sleep and drinking half a pot of coffee the next morning to get going again. They focused on the fact that he had developed a problem with alcohol and marijuana.
Not long before his death, he failed a drug test that showed cocaine, but the medical records show that when Stuart was being admitted, he admitted he had tried cocaine three times but didn't like it. I suspect that when he was under those restrictions, he couldn't get to alcohol and he couldn't self-medicate, so he may have accessed cocaine. That was not the underlying issue. The underlying issue was his PTSD, but he was written off as a loser.
In my honest opinion, looking back with 17 years of hindsight, they made the decision that Stuart wasn't going to get any further treatment. I think the restrictions they placed him under were simply setting him up to fail so that they could then fire him and get rid of him. They had no interest in helping him at that point. I'm sorry; I truly believe that.