Even when the management changes - the game won't change anytime soon, if at all. When another management comes, there are completely different projects that take several years to realise, so you can't expect quick results. But as it turned out, there is no point in changing the coach either, nothing will help them, it is not the team that needs to be changed, but the approach to work on the management side
Yes. Even changing coaches too often can sometimes have a negative impact on a team experiencing setbacks. A new coach will inevitably bring new strategies and coaching styles. Adaptation will occur, both for established players and new arrivals. None of this will be easy. And the results won't be as immediate as imagined. It will take time. But if the current management can solve this team's problems quickly, I'd truly commend them. However, I doubt Manchester United will be able to bounce back immediately at the start of the season. The team's chances of improving are likely to be towards the midpoint of the season. Amorim is a great coach, but he's usually the type of coach who needs time to maximize team performance, as he demonstrated at his previous club, Sporting CP.
Oh no, I no longer believe that the coach needs more adaptation. He, like Ten Hag(who had a few seasons) had a whole season, that is - enough time to just at least stabilise the team. But no, the team slid to the relegation zone. And the only conclusion I can draw is that the problem is not in the coach at all, but higher up. No coach can help them as long as there's chaos.