In my opinion, sacking Napoli's coach at the moment would hurt Napoli a lot. Napoli should not have made such a decision at the end of the season. It takes some time for a new coach to take control of the team. In the mean time, Napoli's title race this season could go from bad to worse. Even though Napoli are not in a good position in the serie A points table, I think Napoli can slowly go further down due to the sacking of the coach this time. Now it remains to be seen how far Napoli can go with the new coach.
Napoli seems to have been very hasty in making a decision to change their coach since Spaletti left Napoli. Yes, they seem to have lost their direction and lack confidence in the abilities of the coach they choose. The problem is why did they take a coach who has no experience in a league like this, even if they change coaches several times, the results will probably still be the same. Let this season end with results like this, it even looks like they will fail even if they only get to the Europe League. Especially next season, there are already several clubs who want to bring in their players, making it possible for Napoli to become even worse if they don't do something even more extraordinary.