Rudi Garcia has been sacked, they called back Mazzarri after 10 years.
Conte is rumored to have refused them, twice.
Finally, Napoli fired Rudi Garcia.

It makes sense, Rudi Garcia never improved Napoli performance. We even heard a rumor about bad relationship with the players. This will have no solution, firing him is the best decision.
I'm surprised Napoli hired Mazzarri. I think there is no very special thing with Mazzarri when he was the manager of Napoli in 2009 until 2013. The only thing that he can achieve with Napoli was winning Italian Cup in the season 2011-2012. But Napoli may have no alternatives for the coach, so they decided to sign Mazzarri.
It is very unfortunate Conte rejected the offer.

To be honest, I'm not surprised that Rudi Garcia was let go by Napoli. And those whispers of player dissatisfaction? The squad wasn't exactly winning under his leadership. Anything like that is never good. They made the proper decision, in my opinion. Football management is a hard business, and occasionally adjustments are required. Currently, I'm not sure how I feel about Mazzarri's comeback. While his prior tenure may not have been revolutionary, winning the Italian Cup is nonetheless a noteworthy accomplishment. Perhaps now is his chance to return with new tactics and insights. This time around, he has a different squad, which might be the biggest factor. Before making assumptions, let's give the guy a chance