This is eerily familiar. From the ages to the substance abuse to the mental illness on both sides, just incredibly similar. I've been your wife in this situation, and I hate to say it, but things got much, much worse before they got better. Not only did my drinking get worse, so did my SO's anger and abuse; even after fleeing for my own safety, I didn't stop drinking until a few years later.
You need to recognize a couple things here.