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Your worries have come true, Man United will definitely not qualify for the UCL League. Never mind qualifying for the UCL league, they also didn't qualify for the European league and European conference league. Initially I saw that Manchester United would get better after being coached by Erik ten Hag because last season they actually performed better, but this season Manchester United has slumped again and doesn't even look like a strong team, sometimes they lose against weak teams.
However, Manchester United's downturn this season is not necessarily Erik Ten Hag's fault because many of Manchester United's core players have suffered injuries, in fact player injuries come and go, so it is very natural that Erik Ten Hag has difficulty implementing the strategy he wants. Especially when coaching a team as big as Manchester United there is a lot of pressure. from various circles making it difficult for coaches and players to recover mentally after defeat. Keeping Erik Ten Hag is the best option at the moment and giving Erik Ten Hag time, because changing coaches is also not a good solution.
Erik ten Hag failed to meet the fans' high hopes this season to perform better than last season. Manchester United failed in all competitions including the Champions League, but I would still hope they can win the title in the FA Cup even though they have to face the strongest team in the Premier League, Manchester City.
Winning the FA Cup title would be comforting for all fans, so I hope Ten Hag can make it a reality. I know beating Manchester City when they are in their best form is very difficult, but the atmosphere of the final should be able to provide a lot of motivation for the players to give their best. That's the only title I can still hope for for Manchester United, other than that there is no hope.