am I wrong to feel this way?

Well first off I am 21 years old and I have a sister who is 17 and she stay with me but anyway when I came in from work last night she had our dad there well I guess you can call him that he claim he's clean now and everything because he was a drunk and I remember he use to always fuse and with her and would always treat her wrong he up and left us when I was 13 years old and Kayla (little sister) was 9 and now he come back talking about he want us in his life and all that other bull crap like I'm going to forget how use to treat my mother he come trying to give us stuff and I told him we don't need anything from him and he asks why and I told him any a father can just come back like this not an a**hole.so my question is is it wrong to feel as if he don't even exist cause were better off without him be honest say whatever you think