I see where you are coming from and find your premise to be mostly agreeable. I just don't see how calling it free will is helpful, when there is nothing free about it.

To follow up on your example, if I'm truly convinced that the decision to use the drug was the less desirable option, and I still used it anyway, that would imply that I felt forced by an outside source. I would not even view that as a choice that I made. What is more likely, though, is that using the drug was always my real desire, regardless of the stories that I tell myself to feel better about my own depravity. In this latter case, it's just a slightly trickier version of the free will illusion. This storyline, more often than not, comes off as textbook self-deception.

But let's say it's not self-deception, instead sticking with your original proposition. From my viewpoint - as the drug abuser - the illusion of free will was never present to begin with. I never felt like I had a choice to make, I just acted on pure impulse as a result of my addiction. I may still experience regret and feel responsibile for my inability to resist the urges, but it's not unheard of for people to take responsibility of an act that they never had any agency over to begin with. One morbid example of this is how rape victims often blame themselves for not acting otherwise, even though they fully know that their agency was severely diminished by uncontrollable circumstances.

In either case, there is no genuine free will to experience, but the latter case features the illusion of it, when as with the former, one just immediately admits that it was never there to begin with. So, why call it free will at all? If we must make a distinction between the two scenarios, we could use words like "will" or "desire" without pretending that freedom plays any part in it. My main problem with compatibilism has always been its potentiality to reinforce the layman concept of free will. I think it's more conducive to abolish the term entirely, and instead use new terminology when nuance is required. "Free will" carries far too much baggage.

Edit: I said I wouldn't get into this rabbit hole in the other comment chain, and yet here I am irresistibly at it again. That's fairly amusing, considering the subject at hand haha. Certainly hope my comment makes at least a bit of sense to you, after all that.