Why doesn't my grandfather like me?

[gwen]

My grandfather is like 55 years old and i swear he has it out for me. I'm only 17 years old and he criticizes me and blames stuff on me, hes never really liked me too much and i don't know why. Recently i moved him with my grandmother and him because my parents moved away and i decided to stay at the same school. He blames my mother (his daughter in law, hes not my biological grandfather) and calls her names and says shes a ******* idiot and stuff and purposely does it around me just for me to hear, personally i dont like him either just for the fact that he talks about my family like that. My brother and him are friends and like each other but i just dont understand why he dislikes me so much. he will completely avoid me and not talk to me, and when im around he purposely talks about me right in front of my face, a day ago i was sitting by the kitchen counter on my laptop and he goes in his computer room and shuts the router off so i cant use the internet, theres. if there is no reason why he dislikes me, how can i make him not hate me so much?