The erratic form of Napoli throughout the season does raise doubts about their capability to maintain a high level of play against tough opponents consistently. It's not impossible for Napoli to start winning against strong teams and climb up the ranks, but it does seem more likely that they may continue to struggle with inconsistency. Their lack of a serious winning streak so far contribute to the skepticism surrounding their prospects for the remainder of the season.
It would be well-deserved if Napoli were to start winning consistently, but they need to remain realistic about the challenges they face and the patterns they have exhibited thus far. It wouldn't be surprising if they continued to experience ups and downs and finished the season outside of top four. It's reasonable to expect that they may struggle to maintain a consistent level of play until the end of the season.
Yes and they haven't been used to fighting with their struggles and digging themselves out of a hole. Last season it was the overwhelming self-confidence and high quality play that made their lives easy. Winning was the standard for them and they had an advantage over all other teams that was unbelievable at some point. They were hoping for another similarly successful season, but now there is not even a chance to win the title and they are struggling to qualify for the Champions League. Even more, they understand that the whole league didn't sleep last season. AC Milan, Inter Milan, Juventus Turin, they all noticed that there can't be another season for Napoli that goes the same way. However, now it is Inter Milan and I think if a team is able to maintain that level for a few seasons in a row, it would be Inter I guess.