“I drink alcohol every day, why am I chronically depressed ?”

The most obvious thing in your email is the fact that you are drinking everyday for the past 10 years — and are asking why you are depressed. Almost all of the things that you are mentioning, being scattered, underachieving, anxious, etc., are in some way tied to alcoholism or abuse. Why not deal directly with the core issue. Nothing, no form of therapy or medicine, is going to help if you don’t deal with the drinking. Alcohol is a central nervous system depressant. If you are taking it in everyday, you are not giving yourself a chance.