He was never used to his full potential. Higuain is certainly one of the best forwards in the game for the last 5 years, but he suffered an unnatural accident with his back that robbed him of his speed ever since. If you saw Higuain when he was young, you'd think that you were watching the new Thierry Henry. His speed, dribbling, and finishing were immaculate, but his injury hindered his abilities. He's never recovered from that back injury. I know this first-hand since I saw him for about 2 years before he got injured (around 2010), and then watched him until 2013, when he left Madrid.
He started off in Madrid around a group of players that you cant look bad with , Then he moved on to Napoli and isnt proving to be as lethal as everyone really thought. As for Argentina , same case applys in where he is around what can be called the strongest attacking force in the world. As a napoli fan , i really find him a lazy player until it comes to big games , which is not what a player is made out of. What do you think