It seems, if Napoli keep Mazzarri until the end of the season then ya, there seems to be no good chance for Napoli to be able to improve its position in the Serie A standings. Although indeed, in the past Mazzarri had a good history in becoming head coach for Napoli. But ya, of course the past and in this era at least have different match tensions and of course different styles of play too. So yes, it doesn't seem right if Napoli expect a lot with Mazzarri to repeat his success like in the past. Because anyway, Mazzarri is also not used to handling other elite teams out there, so basically Napoli still needs the right coach to restore Napoli quality and performance.
What happened to Napoli this season was really sad, after winning the Serie A title, their game immediately changed even though not many players left. It is true that Napoli is strong because of coach Spalletti, but now that they have changed coaches twice, their performance has not improved, even with coach Mazzarri, Nopoli is getting worse. I don't know if a change of coach will be the solution for Napoli now to improve their ranking in the standings, but what is clear is that this is not the right choice. Changing coaches will not improve playing performance because changing coaches requires more adaptation. What Napoli needs to do now is continue to correct mistakes in every match so that the team's confidence can rise again. Nopoli's condition is very bad now. Even Leicester have never performed that badly a year after they won the EPL title.
The factor of Spalletti departure is the strongest reason why Napoli is currently experiencing a drastic decline in performance, even though Rudi Garcia and now Walter Mazzarri have most of Spalletti legacy players in the main squad. It is possible that the President of Napoli will fire their coach again and appoint a new successor if he thinks that Napoli is too down. Failing to manage their self confidence as defending champions, perhaps this expression is suitable for Napoli at this time.
The increasing performance of the mid-table teams makes it increasingly difficult for Napoli to penetrate the top four of the standings. It can be concluded that Napoli has failed to defend the Scudetto even though the season is only half over. In the Coppa Italian, Napoli have been eliminated, their only hope this season so as not to fast for a title is the Italian Super Cup, Fiorentina is their opponent in the semifinals there. In the Champions League, I don't think Mazzarri squad will be able to beat Barcelona, I think their progress will stop in the round of 16.
The solution for Napoli in the future is to look for a new coach with a wealth of experience. Previously, De Laurentiis was reported to have approached Conte to replace Garcia. I was surprised when I heard the news that Mazzarri was finally appointed as the new successor. On the other hand, retaining Osimhen and Kvaratskhelia is an obligation, if they still want to challenge for the title next season.