-snip-.
If Napoli wants to fire Rudi Garcia, I think it will likely be a blunder for them because we often see teams that frequently change coaches and certainly won't be able to make many changes in the near future. However, that is up to the Napoli owner because if he is not satisfied with Rudi Garcia performance, he could fire Rudi Garcia if Napoli loses again in the next match.
There will need to be more adaptation if Napoli changes to a new coach, but if in the next match Napoli loses against another team, I think also Garcia position will be very threatened at there. Because the next match is against Verona and it would be very unworthy if Napoli lost, but I don't think Napoli will lose anyway. Verona is not a strong team on paper and Napoli should be able to win perfectly, although they are playing away.
Since Napoli decided to change the manager once, no matter how well the club performs under the current manager, it will not be noticed by the management, but if some matches are bad under him, it will be seen very big. Napoli has a match against Verona. Napoli have always performed well against Verona so they must perform well in the upcoming match as well. If Nepali's performance in the next match is bad for any reason and if Napoli loses points in that match for any reason then the manager will be fully responsible for making it bad in that match. Napoli are doing poorly under the current manager but what will the management decide if they do poorly under the manager they hire in the future.