I used to drink a fair bit and over the last 4-5 years started drinking more and would be angry (never violent) and never seemed happy… I didn't believe it so started drinking more to hide from the fears.
It was a fallback and I'm not proud of it at all.
Most a people don’t the willpower every day to make permanent change—that’s why they remain stuck in their groove (e.g., alcohol abuse) despite occasional good periods. With diet, when people are ready to change they seek exercise groups, running partners, teams, coaches etc. to direct and keep them going. What outside resources are you leveraging to stop alcohol abuse? AA is popular. You’ll be assigned a mentor you can call when those days hit instead of pulling out a bottle. 12.75% suffer from alcohol abuse. Your family already knows. There’s no shame in seeking help.
You already said it—this is why she wanted out. Is that a prompt for long-term change?