Not liking your grandchild

Hi all. AIBA for not liking my granddaughter. She is 3 later in the year and I am really struggling to like her. I love her but her behaviour is absolutely atrocious. Kicking, hitting, swearing, screaming and throwing things are just some of the things we are putting up with. Her dad my stepson, was getting married in the Summer and 2 days before the wedding his fiancé called it off. I have him living with us but I am so worried about the parenting styles of each of them. She, her mother wants a little friend and someone who she can dress up. He, my stepson is trying to instill disapline but it's not consistent. I fear for our GD as she is having bad reports from nursery ranging from hitting other kids to screaming in kids faces and not allowing other kids to play. I think she is the child they dread walking through the door. She is quite happy playing by herself but this also worries me as she doesn't play nice with other children. Any advise would be great as I feel terrible. On another note I don't think I bonded with her as I was having BC treatment when she was 2 months old so I wasn't in any fit state to look after her, which is something we did with our other GD who I adore. I just want to get to that place with her.