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.