zany I have a question for you... what are you going to DO to help you cut down / take control?
The wise (if argumentative) MIFLAW says that will power alone is not enough, and I think that you have been finding that out for yourself. In fact MIFLAW says iit is as difficult for someone with an alochol problem to control their drinking by willpower alone as it is to use willpower to control diarrhea.
It sounds as though you are intending to cut down, but end up drinking the whole bottle anyway. Not surprising because once you've had a couple of glasses your willpower will be reduced anyway. That is why I (and some others) avoid having the first drink. If having a day of total abstinence is not what you want to do, and if you have demonstrated that buying a bottle of wine means you drink the whole bottle, then why don't you buy a half bottle? Just ONE, so that is all you have in your house. There you are, your drinking halved in one easy step.
Have you tried that? Do you want to try it? because if the answer to both of those questions is 'no', then it doesn't actually sound as though you WANT to reduce your drinking. It certainly sounds as though you think you SHOULD cut down, but unless / until you really want to, it doesn't sound much as though your habit is going to change.