There are rumors that Ancelotti would be coming to Brazil at the end of the season which I think would be a good thing for the Brazil National team. He is a coach who can bring the best out of the team he has been given. If he can do as he is expected, they can probably get back on their winning days.
I am not sure what impact the new coach will have on the performance of the Brazilian national team. Their poor performance in the 2022 FIFA World Cup and also during the CONMEBOL World Cup qualification tournament so far can be attributed to imbalance in the team and overdependence on certain players. Even if Carlo Ancelotti becomes the coach, what he can do about it? And the recent injury issue with Neymar also contributed a lot to their poor form. These are things beyond Ancelotti's control.
I actually can't agree that a new coach cannot change the team!! A manager controls the team, controls how they play, and all that stuff. Look at what Pep Guardiola has achieved with Manchester City, do you think other managers can do it and win the Premier leagues a few times in a row like it was nothing?
Ancelotti on the other hand knows how to handle his team. As I have said earlier, he brings the best out of the team that he has been given. Neymar is not the only player in the Brazil team who can play well, they have new youngsters right now who have already achieved more than Neymar. I am not saying they are better than Neymar; they have the potential to become better than him. Neymar's injury will have an impact on the team but they have to work with what they have. And Neymar needs to be consistent about being fit as well. They have very good wingers right now, for example, Gabriel Marinelli, Vinicius Jr., Rodrygo, and many more.