And I think it all depends on the personal qualities of the player himself... This is a professional sport and players regularly change clubs, teammates and coaches... Of course adaptation happens and there are probably psychologists in the team and a certain period for the player to adapt to the new club... But it seems to me that there is nothing difficult for a professional athlete...
You are right that everything is measured in terms of the personal qualities of the players, because after all they have become professional players, in other words the demand to adapt quickly should be an important lesson. So even though it still takes a long time, it doesn't mean that the end will be good depending on the coach's management when increasing the motivation, suitability and comfort of the players themselves. Therefore adjusting enough time this season in my opinion would be very unethical when players still say it takes time continuously while the game is still a game where all players have to solve problems together.