That is horrible to hear. I hope you can throw this shit far far away.
Have you tried so-called "non-alcoholic" beer (instead of stronger drinks), i.e. that which is not actually non-alcoholic, but contains about 0.5% alcohol? I don't know for sure, but I just imagine that if you'd try to use that honestly, I mean as a substitute, in order to cut down on any stronger alcoholic stuff that you would otherwise consume, perhaps that could be an improvement? The hop contained in beer (also in the "non-alcoholic" one) has a pleasent calming effect (which might outweigh the effect of the little alcohol contained in it). Much healthier for sure than f*** benzodiazepines.
Benzodiazepines destroy all willpower, turn brain into cotton wad and people into mindless zombies and idiots. They are only for the weak. Except maybe in a very short very controlled period of hardcore withdrawal. But how crazy to hand this stuff out for self-medication to someone struggling with alcohol addiction?