De Laurentiis has accused the Juventus boss of only caring about money.
He told Corriere dello Sport: "He angered me with the vulgar excuse of money, forced me to find another coach and had two years left on his contract.
"In February 2018 he invited me to eat at his house in Tuscany, he never spoke of leaving. It took me until the day before the last game without saying anything, creating uncertainty."
He added: "I don't know if signing him was the right thing. After the first season I had to say 'Carlo, for me you are not suitable for the type of football they want in Naples, we keep our great friendship, football here is something else. Better to finish'.
"And instead, I was wrong again."