Osimhen with this transfer to Galatasaray actually made a big mistake and it starts a downside of his career. He will need to find a better club after the end of this season, possible destination can be La Liga or Premier League if he wants to play at highest level.
Many people talk about this, although the truth is I don't know what could have happened there. Yes, the PL is the best league in the world at the moment, because of the high level of football they have shown, but whatever Osimhen has decided is something that suits him to climb towards something else. It's hard to think that it could have influenced him, but for me it has to do with some moral issue or something. This player has always been determined to follow his heart a lot. I think his emotions could have been behind his decision.
For me, about Osimhen playing at Galatasaray it is something good because anyway, considering about the transfer rumors that previously happened about Osimhen's move to PSG, Chelsea, Arsenal and maybe some other top teams also from different leagues that failed and or did not really happen. So, if Galatasaray do not sign Osimhen it will be worse for Osimhen, because Osimhen is also no longer needed at Napoli because Conte did not include Osimhen in the Napoli squad this season.
With this case, then playing at Galatasaray remains a good choice for Osimhen because he has accepted it. Because after all, the Turkish League is also basically a competitive league and moreover, Galatasaray will also still play in the Europa League this season. Thus, there is no setback whatsoever about Osimhen because after all, at Galatasaray also only has the status of a loan player and of course, there is still a chance for Osimhen to join other top European teams when the transfer window opens again later.