Losing Osimhen is a frightening scourge for Napoli because actually before they lost to Milan in the Champions League semi-final they were also slaughtered first in Serie A by Milan and indeed it cannot be denied that Napoli are without a striker who has good instincts, they are always confused and Milan has a very good performance and strategy to blow Napoli.
It was a fair game as Milan's strategy has proven to work and Napoli don't feel this is not enough because 3 consecutive matches with Milan proved that they are still lacking when some shafts are not filled properly.
The Seria A is very competitive this season with almost all the elite clubs in good form this season. Italian clubs even made it to the quarter and semi final, and only one of them will emerge to UCL final. Victor Osimhen is the top goal scorer for Napoli and Luciano Spalleti can do without him. I'm afraid the Parthenopeans will lose him in the upcoming transfer window, elite clubs are desperately eager to place bids for the Nigerian-borne striker. Hence, Napoli are inferior against AC Milan this season. I guessed Stefano Pioli is Luciano worst nightmare this season, AC Milan always having a upper hand in game points against Napoli.
The Serie A teams are very strong indeed this season and that can be seen in the Champions League, but only Napoli can be consistent so that they are able to lead the Serie A standings with a long distance of points.
regarding their loss to AC Milan in the UCL quarter-finals I think a reasonable result because AC Milan is also a strong team and also AC Milan's experience and mentality in the UCL is better than Napoli.
and for Victor Osimhen is the most important player in the Napoli team this season, even since last January's transfer many teams wanted him but his ability to stay at Napoli until the end of this season was a big advantage for Napoli.
for next season, of course, it is very possible for Victor Osimhen to leave because many top teams want him.