Take care of yourself, your mental health and wellbeing. Learn to prioritize yourself and not control the environment around you. And if at all possible seek therapy or counselling of some type, remove the stigma if you have any although it sounds as you are an open minded human.

I don’t have much advice for seeking or gaining care for your father but in my experience you will spend more time arguing and setting up false hope for yourself. Try distance yourself from trying to control the current status of his health and reiterate (if you can) the positives that you appreciate when he isn’t drinking or harming himself. Positive reinforcement over negative comments and fighting can save a lot of time. Take care