His actions seem like the height of ingratitude, and may well be, but keep in mind that this man is still addicted, and is going to keep acting that way.
That (drug addiction) is a dark well that anyone could fall into under certain circumstances. If one is taking strong meds for pain, never forget that they could very quickly become habit forming.
When I go to the dentist, I want all manner of pain relief.
I am not embarrassed to ask for it. When I leave the dentist, I try to only take the minimum meds for it.
Maybe it is a “deep dark well that anyone can fall into” Mr. Virtue Signaller, but the ones who have fallen into it have no right to drag everybody else down with them, which is what they do with their lying and stealing and betraying to get their next fix.
Let’s do everything we can to drag everybody else down too, shall we? Be sure and tell them how evil and selfish they are for resisting.