I definitely felt that I drank to medicate my depression and my self diagnosed (thank you, Dr. Google
) ADHD. And that's why I couldn't quit for ages. Because I was working on my anxiety etc but still drinking. Drinking less, mind you. But still drinking and not quite getting it.
When I made myself quit 'no matter what', I then found that my other symptoms magically abated.
I think there is a definite comorbidity. Not necessarily the cause-effect relationship I once believed.
I think for me anyway I lacked (and still lack) coping tools to deal with things. I only ever really learned to drink.