Indeed. No manager will stay forever, someday he must leave the team. When a new coach/manager comes, he must have some challenges. He needs to adapt with the players and the atmosphere of the competition. Sometimes it takes for more than 1 season to adapt well and manage the team in the right way. Choosing the right strategy/tactics must know the players first, it won't be easy and won't be in a short time. Even a coach is an experienced person, it won't be an instant process to adapt with a new team.
Any great coach also needs time to make a club successful, Carlo Ancelotti, Pep Guardiola, Jose Mourinho, Thomas Tuchel, Jurgen Kloop. They are great coaches and they need several seasons to make the club they coach win a title whether domestic or international and clubs also have to be more patient in dealing with the process because it is not easy to build a club, especially building a big club, it requires focus and consistency so that the club can perform well. There is no coach who gives instant results. If there really is one, I think his hands are magical.
It even took Xabi Alonso 2 seasons to improve Leverkusen's performance to become an unbeatable club even though Leverkusen is not an elite club, but when the management is patient and enjoys the process, finally Leverkusen can enjoy good results this season and win the title, so if the club wants success they should Don't change coaches in a short time because that will make it difficult for the players to adapt to the new coach and make their performance unstable because they have to deal with different coaches who have different strategies.
Yes, I understand that a coach definitely is going to need time to bring in good results with a club. But my question is how far is someone going to allow his club to drop? Is it ok if the club actually goes to the relegation zone and starts improving? Or is it ok if the club actually gets relegated and after that starts improving? I think a lot of people are actually concerned and want to see a new coach quickly because they are actually worried that something like that might happen. Of course, it is an example of the extreme situation that could happen. But people are always going to assume the worst. Just because it took someone two years to bring in good results with a squad, doesn’t mean for the other coaches it is going to be the same. It could take longer or it might not even take two years.