Anyone can say what they want, meanwhile Milan AC won.
In my opinion it was a good match and also a good boost of self-esteem for the team.
They needed it after the last few games ended very badly, i understand good their mood very well: when someone works hard and doesnt get results they get depressed.
Milan has always had a very good potential and they have everything to be much higher in the table, maybe the reason was precisely Fonseca, and the team needed a coach who believes in the team more and can motivate the players for each game. I see this in Conte, when he comes to a new team he is filled with energy and inspires the players with this, you can see it when you watch his matches, maybe Conceicao is just such a coach, and yes, this victory is very important for Milan.
If Milan had not sacked Pioli at the end of last season and replaced him with Fonsesca, I think they are currently still one of the Scudetto contenders along with Inter Milan, Napoli and Atalanta, but the change of coach did not have a positive impact for them because Fonsesca was unable to manage Milan well despite being filled with a quality squad, In coaching, of course, coaches must not only have the ability in tactics and strategy, but they must also be able to really understand the character, style and mind of the players so that the team will become stronger and also have better cohesiveness and mentality, currently Milan has been taken over by Conceicao who has a pretty good reputation in porto, so let's see how much Milan consistency increases in the remaining of this season.