I don't want to say it's impossible, but the performance shown by Napoli at the moment is quite bad. Facing Cagliari might not be difficult for Napoli, but they will have difficulty facing mid-table or even stronger teams.
Napoli this season is not like last season, I wouldn't expect much from Napoli this season, in fact, next season might be even worse for them. I've lost several bets on Napoli.
Your loss of bets to them doesn’t make it conclusive that this team will always be poor and they won’t be able to be at their best again just like they were last season. Napoli’s performance is really shocking to everyone and we all thought they’ll play better this season after a spectacular season last year that gave them the league title. I am not also expecting too much from them this season again but playing against Cagliari should be an easy win for them even though their performance is not encouraging anymore. I hope things gets better for them by next season or they’ll lost their glory they’ve recently built after so many years.