I'm mad at my older siblings for making me take care of all the household bills and taxes for our parents.
Why do you dislike doing these things for your parents?
Because my parents will never appreciate anything that I do for them.
I'm sorry you feel this way. I think you should discuss this with your siblings and let them know it is too much to take on all on your own.
It is too much for me and I think I am being taken advantage of because I am too nice.
Talking to your siblings about your concern will help you all to be on the same page. It's okay to let them know that you feel taken advantage of.