I don’t feel I had a deadbeat dad per se - my father was in house, if emotionally absent due to being on drugs a good chunk of the time. This isn’t about me.
However, in my family, there are many men who have went from loving fathers who had literally nothing to do with their children after a separation or split.
My grandfather was apparently a loving father. He cared about what his daughters did for a living. He was upset when my aunt wanted to become a Nun because he felt she could do better with her life. He refused to allow my other aunt to join the military because women were mistreated in it. But when he and my grandmother separated, he went and lived his own life and he was rarely, if it all, seen for the next five years. My uncle was 4 when he left and they never really knew each other properly.
My sister’s father apparently loved my first sister very much. I’ve seen photos of him holding her, kissing her, being very affectionate. He wasn’t happy with the birth of my second sister as he felt they couldn’t handle two kids. They separated when my first sister was a year and a half and the second sister was 5 months old. Outside of an attempt to visit them the following Halloween with his new wife (my mother wasn’t home, my grandmother was watching them and she slammed the door on him and his wife) he never wrote, called or had anything to do with them again. The next time they saw him was when he died. My mother has told me he had a troubled relationship with his own father. He never thought he was good enough in his father’s eyes - so he had to understand what missing a father’s love was like.
My sister’s first husband, with whom she had 4 kids, was there until they split up when the eldest child was 5. He was pretty affectionate in the home videos I’ve seen. After they split, he then acted like they didn’t exist.
Or look at someone famous, like John Lennon. Wrote moving songs about the lack of his own father in his life, and proceeded to basically treat his first son after he broke up with the mother like he didn’t exist.
How can this sort of disconnect/level of detachment happen - where a guy can literally pretend his kids don’t exist? Psychologically?