One of the biggest problems fans have is finding fault with their team when they lose. Ancelotti is certainly a great coach with no bad record and he performed well with Real Madrid. Ancelotti didn't have much to do in Brazil's first match, it was basically a match for him to study the team and identify their flaws. He has shown why he is an influential coach, as you can see from his performances in the last two matches. I hope Brazil's success will resume with Ancelotti and it will be a long one.
You don't blame the fans much because they expect nothing but a positive result in every game and when they don't get it despite who you are they will start complaining about you because you promise to always win games for them they expect every game to always be a win and nothing more.
Ancelotti understands what's happening and at his age his experience as a manager he should always look forward to getting good results and not mind the side talks from the fans.
Brazil's first game under the manager didn't go well because of the results but Ancelotti is proving himself and getting them the desired results he's definitely going to restore the beauty of the samba football back to them.