I think your family is in good company.
Years ago, my M-I-L was sort of quietly trashing her daughter-in-law who was becoming lit at a family function. I walked over to her and said, "Helen....she just has what your son has". (her son, my husband, a "recovering" alcoholic)
She could not see the forest for the trees because she was shame-filled about the disease in her own offspring.
I am a confirmed codependent. I have been watching drug addiction in my family of origin, my married family, and many people I've worked with over the years.
That said, I believe in redemption.
Very much.
Your family is so very limited. They are acting out of a shame-based system. That's really tough to overcome, especially when they aren't even aware of it.
You might wait awhile and make another, more direct and personal attempt, but maybe focus on the good people you do have in your life. And of course (as Barb said) the most important relationship you have.
(I assume you've done your 8th and 9th steps)
Peace....drop in again