Responses
Well... Roger was dying because of an incurable disease, he was being chased by the WG and marines (so being related to him was dangerous), so he entrusted his son a friend in who he had faith... he loved his son, but he couldn't raise him. Dragon seems like a terrible father, but we know almost nothing about him and his story so I won't judge him yet. Yasopp abandoned his son because he chose his dream and adventure instead, so he is an horrible father. Judge is not only the worst father, he's also a terrible human being. (trash)
I'LL SHRED THEM TO PIECES! THIS IS NOT HOW FATHER SUPPOSE TO BE! EVEN ROGER OR DRAGON
(despite them don't raise their son) ARE BETTER THAN THIS!