Sorry man. I feel like you do about my mom though I have some strong anger on days. I can temper it with understanding.
My dad never took any care of himself despite being diabetic. His neuropathy was bad in his legs and feet and he had high blood pressure. Still went door to door compulsively like most of them and fell down steps and off porches. Gave public talks and didn't finish a few of them. Was blind in one eye and never told anyone and was still driving people in service and drove my mom and sister everywhere.
Denial is the drug most of them are addicted to and it's insane to watch.