jilian,

Rarely an alcoholic is able stay sober without help; whether its AA, therapy, rehab, etc.  If he has past trauma that is unresolved then I suspect he will continue to self medicate with alcohol or something substance that puts his demons out of his mind for a while.  The anger is part of his acting out his trauma.

You cannot fix him.  Whatever you do, he will still have his unresolved trauma and addiction that goes with it and the anger resulting from that.

Go to Al-Anon for that is a support group for people who are intertwined with addicts.  You can hear their stories and ways to deal with an alcoholic.  They will tell you it won’t get better.

Mark