Last season was a much better season for Manchester United, and at the end it seemed that ten Hag was able to improve the team, and their results were going up, they finished in the top 4 in the Premier League and, as you mentioned, they were very good in the cup. But this season is not at all similar to the last one, the team had a lot of problems with players who definitely influenced the team’s results in all tournaments, a bad game in the Champions League, they are sure to be left without the top 4 this year, and I assume that Liverpool will be their an insurmountable opponent in the Cup match.
This season and last season are very different. Last season, Man United started to improve from the start of the second half. In fact, they were unbeaten in many matches in the second half of last season. But in the second half of this season Man United did not have any significant improvements at all. It's just that they have rarely experienced defeats lately. But their performance hasn't improved much at all. Their defensive line may have improved a bit and their front line has also improved a bit but the overall balance is still not that good. Even in the match against Nottingham Forest, we could see that Man United had a little difficulty scoring goals. So in the next FA Cup match against Liverpool maybe it will be more difficult for this team.