It's the same thing that happened with Scott Hall. DDP got him clean, got him in shape, helped fund surgery to fix a lot of his pain, got his finances squared away, and got Hall back into the appearance circuit after he had basically been blackballed due to his behavior. Then Scott started drinking again and everything fell apart.
These guys are fundamentally broken. You can hold their hand and support them and make some progress, but they will always fall back down because something inside of them is just wrong. It really sucks because you can see DDP talking about this shit and getting more and more frustrated and cynical as the years go on. When he started out he honestly believed that deep down everyone wants to be a better person, but they just don't know how to escape from their circumstances. So he gave up his time, money, and home to try and rehab these people believing that they would respond in good faith to his efforts and pick up their own slack once he had set them straight. Almost every single one of them has let him down with the exception of guys like Stevie Richards who was already a pretty decent human being by all backstage accounts, but was just busted up and injured.
You can't fix someone who doesn't want to be fixed, and most people don't really want to be fixed. If they did want to be fixed they would have tried to fix themselves years ago. Part of the reason I stopped trying to encourage people on ogrechan to better themselves. Most of you are human garbage, and are more than content to wallow in your own filth. Occasionally one of you will have a moment of self-awareness and spend a few days crying on here about how unhappy you actually are, but you will always go back to being pieces of shit. You are failures and losers because you choose to be, and no amount of advice or encouragement will change that.