You have come so far, it is very sad to me that he continues to need to berate and insult you.
Seems like the only thing you can do is work towards accepting him as he is, and not how you wish he would be (and as decent people WOULD be). The time will come when you don't take his insults personally but see them for what they are: the sad expression of a person unable to crawl out of the hole of his own addiction, lashing out at those who have wanted or expected him to do better.
Sending you strength (though I believe you have it in spades already).