You're blaming the coaches of killing the fire in Manchester United when we know were all these problems originates from. Manchester United is an elite team that needs winnings and not some random average signings this season. Erik Ten Hag is the most criticized coach currently, when I knew Erik Ten Hag is a mediocre coach was when he made the statement in the press that Cristiano Ronaldo was the problem of the Red Devils, he has issues with Ronaldo and that force the Portugal international to exits Old Trafford. Forward to this present day, where is are the stats of the team?
Many coaches failed in Manchester United after Sir. Alex Ferguson retirement years ago. They actually spent a lot of money for player transfers and for coach compensations because of sacking them. However, there are something wrong strategically in Manchester United as they spent money not for positions they need to improve most. They bought players are expensive costs that are like overpaid and their player transfer strategy is not consistently recent years. They self create chaos in their clubs and hope that a new coach can help them to fix all systematic problems.
This hope is unrealistic and this task is impossible for any coach. Need more example, another club is similar to Manchester United is PSG. They both spent lot of money but failed to gain success they want.