My mother's Ex was horrible to me. It was a standard custody split. He got every other weekend. During those weekends he would insult my mother, insult me, and constantly yell at me for things I'd done. He was also always coming up with things I should "work on." It made me feel like a problem to be fixed. About a year ago I finally built up the courage to say no, and left him. I haven't talked to him since. Good fucking riddance.