Monkey D Garp

Monkey D Garp is a character from One Piece. His job is more important to him than his family. He let his grandson Ace get executed even though he was innocent. Roger told Garp to protect Ace, and what did Garp do? He abandoned Ace and let a bunch of mountain bandits raise him. Garp gave his other grandson, Luffy, to the mountain bandits as well. Garp wanted his grandsons to become members of the marine but let criminals raise his grandsons, and then had the nerve to be angry that his grandsons became pirates. Even when Garp was sometimes paying visits to the mountain bandits, all he did was beat Luffy, Ace, and Sabo up. Overall, while Garp is strong and the "Hero of the Marine", he's a horrible grandfather. He failed both of his grandsons.