Is it normal to hate my sick mother ?

I am 18 years old and live with my oldest sister and brother & my mom. My mom had a stroke when I was about 12/13 and things about her have changed but not her disgusting attitude. She can stil speak, but her voice sounds deep and groggy and she cannot walk, she is in a wheelchair. My siblings help out financially but I feel like physically I'm doing all the work (lifting, pulling, pushing, feeding...etc) with her all day everyday from 6 or sometimes 5 am until 10pm. It doesn't help that she still had the nastiest attitude that she had before the stroke. She often behaves like a child or like she just has servsnts or something and things she can still manage to do on her own she doesn't even try to do, it disgusts me. I try my best not to become rough with her so my frustrations come out in screaming and yelling, but it really makes me sick the way she acts. My brother and sister say I'm just an angry person but they behave the same way if I leave her if I leave her with them for even just 1 day and when I come back all the responsibility is on me again and I'm losing my patience..