Chief highlights Samuel Eto'o as one of the main culprits
Preziosi believes the Nerazzurri showed signs of gamesmanship during the clash which he feels was conditioned by Inter's mixed behaviour on the pitch.
"I am disgusted. The last 15 minutes was implausible. Seeing a team who aims to win the title play like a provincial side is disgraceful," he told Il Corriere dello Sport.
"They really shouldn't be making use of all these little ways. I am really soured.
"And I am angry because this behaviour is a disgrace. Football is different to this. Even Samuel Eto'o making certain scenes is very anti-sport behaviour, going down without even being touched.
"As for Genoa, we played a good game and we shouldn't have lost."