AC Milan president Silvio Berlusconi insists he had never seen the team perform so poorly as they did under former head coach Sinisa Mihajlovic.
Berlusconi has come in for criticism from the club's supporters over the sacking of Mihajlovic earlier this week with just six games left in the season.
The Serbian was relieved of his duties in the wake of Milan's 2-1 defeat to Serie A leaders Juventus on Sunday, which left them without a win in five matches and seven points adrift of the European places in sixth.
Former Rossoneri midfielder Cristian Brocchi was handed the reins until the end of the campaign, having been promoted from within after overseeing the Primavera youth side since July 2014.
Curva Sud MIlano released a statement in which they questioned Berlusconi's affection for the club, and the Italian media mogul has responded in an open letter on Facebook.
"The decision to entrust Milan to Christian Brocchi has given rise to much debate," the 79-year-old said. "All opinions are legitimate, of course: this choice, dictated by my sense of responsibility, is, like any other choice, freely open to criticism from anyone.
"But what I can't share is the fact that we are questioning my love for AC Milan. I have always been in love with Milan and the choices I've made in 30 years of the presidency have always been solely in the interests of AC Milan and of all of those who love it.
"I claim with pride all my choices from first to last, and I mean in dismissing of a coach whose style of play was not up to the history of AC Milan, because let us be clear, aside from the results, we've never seen Milan play so badly.
"To this end, not now but at the end of the season, considering the practical results of this choice, we can take the best decisions in the interest of our Milan."