'She refuses to go saying it is a waste if time, she doesn't have a problem'
That sounds familiar! She's not that dissimilar to you, then, OP...
I think we all get it ,or most do, that the situation is hell on earth, that you are thoroughly exhausted to the core and have perhaps shut down because you can't take any more. I think the general disquiet in some posters is in response to your firm decision that you won't take any more rather than you can't .
I don't think the situation is black and white (is any?): she is an addict, certainly - and it is appropriate to 'leave' an addict; but there are also separate, and clear, MH issues running around making the picture more complex - also decidedly not appropriate to 'leave' someone with MH problems, especially someone so obviously vulnerable and needy. She is also traumatised as she is a victim if rape, which is yet another strand to this awful situation. I appreciate this takes the wisdom of Solomon to sort out, there are no easy answers here. To that end, to have decided to address only one aspect of the complex problems she faces by choosing to leave her, wash your hands of her, doesn't appear to address the other issues she is facing. To then go on to say you are at peace, happy and positive about your choice is bound to alarm, even if others have no experience of the gruelling horror you have all battled with. There is something not right about it OP.
I could suggest that cutting her off may not bring you peace. I have had to cut off my daughter and the pain of that is immense and, no, I don't have peace but grinding heartache and perpetual sorrow and longing, which drains all peace. Your husband may be repulsed (you too?) by her, and it is understandable that you have been tested to breaking point and beyond; but there is something curiously detached about the way you are both choosing to bail out, your husband forcefully, as though this has nothing to do with you. In a very real sense it has everything to do with you, though you refuse to accept that, 'saying it is a waste of time and you don't have a problem'. In very crucial ways - though not all - this is your problem as much as it is hers - though you refuse to see that because you have shut and bolted the door to the obvious link. Al-anon 'wasn't for you' in the same way as you are not the 'type' for counselling. Al-anon IS for you, because you have a close relative who is an alcoholic, whether you like it (al-anon OR alcoholism) or not.
I have also had crap, irritating and patronising counsellors, but not necessarily because they were crap, irritating or patronising. You may choose to see dd as 'bad' and you 'good' (because you have coped and she has not?), and this may be because you are exhausted and want to put it in boxes and draw a line under it (as you did with your parents). To not see it as the solomon's choice it is perhaps illustrates a default denial mechanism you are used to employing when things get too much and unbearable. Which counselling would address.
Ime, problem themes we vehemently refuse to address have an uncanny way of reappearing closer and closer to home, demanding our attention, rrfusing to be silenced. You are refusing it again. If you had stayed at al-anon you would have learnt effective skills to address your daughter's problem in a safe, effective and boundaried way for you all. As it is you have enabled her by repeatedly mopping her up and saving her, which shows your lack of effective knowledge. Now you are depleted and want out: you've given her all you can, been wonderful; though misguided - you were using the wrong tools for the job and they have, not surprisingly, failed. If you had listened to the experts you would have learnt that.