Inter president Massimo Moratti last week said referees were not acting in good faith after Atalanta beat Inter 4-3 at San Siro with the help of a highly controversial penalty.
On Sunday, Cagliari got off the mark with another doubtful penalty, won and converted by Chilean forward Mauricio Pinilla, but Stramaccioni, though critical, was more diplomatic.
"I believe in sport and I believe in values... the referees are making mistakes and they are repeating them," he told RAI television. "The penalty was completely non-existent."
"Until Gargano was injured, we were much the better team and we had created three clear chances," said Stramaccioni.
"Then we lost a player with individual and tactical value."
"It was yet another injury in yet another incredibly jinxed season."
