Babe,
It's never too late. I don't have a lot of time right now, but I wanted to tell you that. Your life isn't over as long as you're breathing.
You won't change your husband's mind about his family. You can't change the past. But you can set boundaries for what is acceptable. You can decline invitations to see his family. You can determine that you don't want them in your home. Or whatever boundaries you need.
And I think Al-Anon is good advice to anyone who's lived with an addict, no matter whether they're actively drinking today.