I am sorry for this situation. My brother-in-law’s parents were also super stubborn and it cost my sister dearly until they passed away. I am very lucky that my own parents usually are very reasonable and accept that they are getting old. My mom stopped driving and they also moved into a smaller, easier to maintain place.

I don’t think there is an easy solution for your situation other than learning acceptance and tolerance so this doesn’t affect you too much. I bet people who live with alcoholics have a lot of lessons for how to deal with irresponsible people while maintaining your own mental health.