What can I do to manage resentment against my father?

I am one of five children. I was our mother's caregiver for our mother. At first my older sister helped with some chores. However, I was the sole responsible for cooking meals for both our parents, and care for my mothers hygiene when she could no longer do it herself.
The five of us split the cost of their insurance policy. I have been told that seeing as I cared four our mother, I should have been given financial aid. I never thought that was a possiblity.
Now that my mother has passed away, I am performing chores that benefit our father. Plus, we still have to pay insurance for him. He was not a very good father and he created many problems that he expected other people to solve. How can I stop resenting him? How can I summon the courage to stop doing chores that benefit him?