I don't know if you've actually experienced this @DBSFstupid but I think if you had you would know how absolutely draining, exhausting and all consuming this can be.
OP has been the main contact, daily, for her father for seven years. Seven years of listening to an angry man rant and insult her. Seven years of this would test the patience and compassion of a saint.
After my mother died I had often hourly calls from my perfectly capable and well father - years of, 'Remind me how I wash a dressing gown again', 'Do you know what time the football starts tonight?' and 'That young woman next door has filled her recycling box with cider cans what an alcoholic!"
I was working full time in a demanding career, running my own home, organising dad's house maintenance and finances, caring for another relation who is disabled and trying to squeeze in my own life too. I was menopausal and permanently run ragged. If I ever said I was in a meeting or busy and would call back I'd be subjected to a tirade of 'Women shouldn't be working anyway, their job is to be here to please men, what's wrong with your husband that you've got to work and not look after him and me?'
The racism, anger, sexism, judgement, constant criticism and undermining is intense. I don't think people realise the toll of older parents who are not ill, not suffering from dementia but just bloody minded, with too much time on their hands to wallow in bad news and get bitter.
He wouldn't get help in the house (he wanted me to do it), he wouldn't join clubs or go to church/volunteer despite saying he was lonely (he wanted me there) and his neighbours (and some more distant family members) all treated me like dirt because he was constantly telling them what a bad daughter I was.
People don't complain about elderly troublesome parents because they lack compassion or patience....the desperation bursts out of them because they are worn to the bone with it. It's an ongoing, hopeless situation and, whilst the parent might die, they might well live another 15 or more years and the ordeal will continue. No amount of love or compassion or practical advice/help can remedy the situation of a person who will not be helped.
t can eat your own life, possibly until you're in your 70s yourself.