I see what you're saying, but to me a part time dad that drops in whenever he feels like it, is so much more detrimental for the child. He needs to act more like a father. He isn't just a knob to Emma, he is a knob to Jeremiah.
In all honesty, if I had a baby daddy that literally just dropped in when he felt like it, and cancelled, turned up late to see his child, I would probably drop contact. As harsh as that sounds. He clearly isn't father material so I'm not going to disappoint my child any further.
All the guys on the show are absolutely appalling boyfriends and partners, but I cant fault them as dads. Nassah on the other hand is a waste of air. I can't even bear to watch him.