In short, Conte as a manager was relatively unknown and most fans weren't satisfied with his appointment. It's not unreasonable to assume that most would have preferred Mazzarri, who was having moderate success with Napoli or then NT coach Prandelli, who before had successfully coached Viola. Allegri is also one of the names, or Guidolin, maybe even Donadoni that fans would have picked ahead of Conte. At least 7-8 Serie A coaches people would pick ahead of him and more than a few foreign ones. That poll is also very indicative where people stood with his appointment.