The Manchester United squad is not weak at all. Manchester United has a strong enough squad. United have plenty of talented players in their squad. But the performance of this team is very erratic. And because of the erratic performance of the players, the team has been lagging behind this season.
It was unthinkable that Manchester United would win the FA Cup. Manchester United won the FA Cup final 2-1 by defeating a strong team like Manchester City. Manchester United were very tactical in this match. Manchester United was able to win the match because Ten Hag's match strategy was good in this match. After leading 2-0 in the first half, Manchester United played a completely defensive strategy in the second half. And I would say that United's defenders played an important role in this match. City's attacking players could not score more than one goal thanks to good performances from Manchester United's defenders.
With Manchester United performances this season, I will say the team was weak; they did not perform to people expectations with the type of quality players they have in the squad. With the talented players in Manchester United, they were not supposed to end in the position they ended this season. Before the season started, many people were saying that Manchester United would be among the top four that would fight for the Premier League trophy, but they later surprised everyone with their weak performances.
Manchester United winning the FA Cup against Manchester City was a big surprise for everyone because nobody was expecting that due to their season performance statistics, but what I saw from the game is that Manchester United was lucky and they also played well.