This is terribly tragic for all concerned. Some people are more susceptible to addiction than others, so it coud be genetic. So it is hardly the alcoholics fault.
But on the other hand, the people closest to the alcoholic have to put up with their extreme selfishness, and often dishonesty where getting the next drink becomes more important than consideration for others.
An alcoholic depends on drawing on the emotional reserves of others, they are 'takers'. The people closest to them are put in the position of having to put up with and make allowances for, the consequences of the alcoholic's behaviour and have no choice to be 'givers' sometimes until their emotional reserves are depleted. Sometimes they crack under the strain.
You op, assume your father is emotionally strong, you berate him for his treatment of you. But what about your treatment of him over the years? May be has tried in the past? We don't know his side. He might be at his wit's end. May be he has chosen to protect himself after years of emotional abuse from you.
Op, it is sometimes best to let go of people you find toxic. We don't know if he was the cause of you becoming alcoholic in the first place, or one of them. You haven't said he was. Was there a cause? Sometimes there isn't one. He doesn't meet your needs, how old are you?
Perhaps he is old and needs someone to care for him rather than being demanded to care for you. There is often a subtle turning point at a certain age. Sometimes people just get tired and broken and give up after years of emotional upset. Perhaps that is what has happened.
Either way op, please don't berate others for their shortcomings when you you clearly have shortcomings of your own. It sounds as if you have reached a turning point in your life. That is positive.
Please try and turn your positivity into seeing the good in the world instead of focussing on the toxic and negative.
What and who are the good things in your life op? You only get one life so please look ahead to a brighter future as it sounds as if you have been to hell and back.
Good luck 