Osimhen will be a good striker for PSG due to their style of play and the gravity of the League. If he joins PSG, he will record a lot of goals in the League one since he have scoring abilities and he get good players that will serve the ball and create chances for him.
In my opinion, I will want Osimhen to join either a Premier League team or a Laliga team in order to show his greatness because people are still doubting his abilities as world class striker.
On the other hand, I don’t think Osimhen will not leave Napoli at the end of the season because he is keen to more challenges in his career, and he will like to play for his dream teams.
If Osimhen is able to maintain good team communication and always gets support from defenders who often provide good passes, then there is an opportunity for Osimhen to score lots of goals, but if Osimhen cannot maintain a good relationship with his team, then he will not be able to score as many goals as he did. As you said, this shows that there is no guarantee that Osimhen will play well at PSG.
Sometimes, it's not all about relationship and chemistry. There are numerous factors greatly impact the gameplay from the players. Even your luck was also able impacting your performance. Osimhen has no problem with his teammates regarding their chemistry. If we were regularly watching the game and Osimhen got many chances from his teammates, but he has bottled it all. You can't really be sure about which factor makes you play so terribly in the game. It is like when you looked like the most prominent player on your team, but you were only able to score a few goals. The problem was not in your chemistry but it's caused by you are not lucky enough.
The Napoli defenders were so poor, and I admit it. The attackers and midfielders also had up-and-down performances in all of their games. Undoubtedly, this club has been unfavorable in getting into the quarter-final of UCL. Even the coach could kill your club through his decision-making.
It's like what happened to Chelsea with Pochettino. I found that many times, Pochettino killed his club through his bad sub decisions. Pochettino put garbage players in, and it totally changed the game.
The subs make Chelsea even weaker, and it loses after it leads the game. I often found that the performance of the club degraded after the substitution happened. Calzona is still having enough time to help his club to play better.
Missed three points against torino is a blunder if napoli puts UCL spot as its main target.