The Azzurri did enough to bag the full three points against Malta, but their captain was not impressed with their display.
Two goals from Mario Balotelli helped the Euro 2012 finalist to three points as Buffon kept out a Michael Mifsud penalty, but the Juventus goalkeeper feels the Italians allowed their opponents too much space throughout the match.
"There were some difficult playing conditions, as it was very windy and the pitch was extremely wet. Plus if there isn't 100 percent focus and concentration, then you are going to run into trouble," Buffon was quoted as saying on the FIFA website.
He added, "I wasn't the only one who got angry, as we all did. These situations happen when there are games that aren't high profile. It is a characteristic we have had for years, as we always seem to leave it open for ourselves, our fans and our opponents. The penalty was an incident, but added to the other five or six chances it showed it was not a walk in the park. Those no longer exist in football, especially away from home."
Italy tops Group B with 13 points from five games, holding a three-point lead over second-placed Bulgaria.