I agree that changing the coach does not guarantee that the problem will be solved, as happened to Chelsea some time ago for example. But the hope to bring change is also there, this will actually be a very difficult consideration for them. If they are wrong in appointing a new coach, then it will be a disaster and the problem will become more complicated, but if they appoint the right coach, then it will be a good solution.
But I would like to say that a change of coach is not guaranteed to bring about a change for the better, but it could happen.
A change in coach has an impact on a team's overall performance. If they hire a good coach, their performance will improve; however, if they do not hire a good coach who understands the team and can use or integrate the players together more effectively, they will continue to perform poorly on the pitch. The players also have an impact on a team's success; if they don't enjoy the team spirit or don't get along with the coach, it can lead to the team not performing to expectations on the pitch. Players and coaches must collaborate for the team's success.
From what I digested in this discussion, I can conclude that coaches and players must be able to create harmony in order to create the desired team. The coach cannot move alone, and neither can the players. They are 2 things that we cannot separate in football, because both are interconnected and even interdependent on each other.
I agree that new coaches don't guarantee success, but they can also bring success. But the coach must also get full support from the management, and in recruiting players, the players brought in must really match what the coach wants and management should not interfere in this matter. I have seen many teams that are thick with management interference in player recruitment, and most of them can be said to have failed.