I grew up with my single mum. I know my father and meet up with him sometime but he never contributed financially or emotionaly to my upbringing. Hence why I don't celebrate Father's.
He always bugged me how men could just walk away from an innocent child and declare "that's it". What makes it OK in their mind to not give any support to the offspring they helped created without it preventing them sleeping at night.
I know i am not an isolated case but i have never heard the other side of the story