The Nerazzurri are technically the away side in their Serie A clash against their city rivals at San Siro.
"Milan are favourites? [It] was a joke," said Stramaccioni.
"It's hard to believe one of the teams [to be a] favourite, we are only at the seventh day [of the season] and both teams have changed a lot this year."
Inter are currently third in the Serie A table with 12 points from six matches, five points clear of Milan.