I don't think D has a drinking problem. Like, if he chilled at home with his family at night and had a few pops, there'd probably be no negative consequences. On the other hand, drinking or otherwise, bad things seems to happen when he makes his late night outings in a small college town's bar district, of which he fancies himself a local celebrity.
If I was that rehab's Reverend Drew, Phd, I'd have him knock off the social media at this stage.