Some people hate their Dad's because they left, others because they stayed, some because they didn't stay long enough, and others because they came back. Some people hate their Dad's because they always came at the wrong times, or never stayed for the right ones, others because they left them came back, and some because they came back, only to leave again. I wish all of these people a very very happy day, despite what situation or relationship they have with their Dad. It's ok to feel that way, you are valid, and no one gets to tell you how you feel or deal with these emotions. Take care of yourself, because you deserve it.