Milan is just a bad team in the first place, they have Gimenez, Felix and Walker, their performance aren't that bad actually, they can still perform. Bologna's squad is a combination of young players who not able to reach senior team, second tier players and old players who no longer playing in senior team, yet Milan still lose.
AC Milan has loss many games in this tournament, even the last game they played with Bologna home, it was a surprise lose to AC Milan because they scored goal to lead the 1st half 0:1, but unfortunately Bologna equalized the goal and beat AC Milan 2:1. But if you check AC Milan players and Bologna players and their position in the Italy league table, you will bet for the favour of AC Milan, but Bologna has proven to people that they are stronger than AC Milan.
I don't think AC Milan managements will use this low performance to remove their coach from the team, than to give him more time to work to improve the team fast, but the managements will not accept this low performance next season because they will not take this low performance next season.