You can overcome this if you truly want to. You need to first acknowledge though that your alcoholism is a problem within itself that needs to be treated as such. Bad news and bad things happen to all of us whether we are sober or not, so we cannot use them as excuses to keep drinking. We drink or drank because we are alcoholics....and it is not a coping mechanism...it makes things worse.
What are you prepared to do to get sober? AA and the other recovery methods you mentioned are active methods that you must work on too. They aren't going to come to you and cure you without you doing your part too.
Having said all that, people overcome incredible hardships and get sober every day. You can be one of them.