what to do???

i have a 6 year old daughter who regularly tells me she hates me and that she never wants to be by me again. i'm to the point that it does not shock me anymore. it makes me weep. our kids seem so angry right now. (the older ones) i'm not sure what to do. if i witnessed their behaviour from afar i would definitely call them selfish brats. i never intended for life to be this way. my children are not kind, they are not joyful, they are not peaceful. i am at the end of my rope. our household feels completely chaotic. i want to start over. i want to have a two year old and a baby and begin again. if anyone has any thoughts PLEASE share them.