At least ETH and his team can still save their faces with that win over City. Fans are focused on celebrating...
Manchester United supporters are not just celebrating; they are also very busy bantering with us and insulting Arsenal for having a good season with no trophies while they had a terrible season and were still able to win a trophy regardless, and how Ten Hag have been able to win two trophies for Manchester United while Arteta hasn't. 
Better to see them happy than Manchester City, those guys deserve to feel feel disappointed.
In the last 33 years, this may be Manchester United's worst Premier League season but in the end, they were able to close it with a sweet achievement in the FA Cup. This trophy can be a solace for the Manchester United players who may be feeling a heavy burden this season. But I think that the euphoria of victory could not really be enjoyed by Ten Hag because it looks like he hasn't found the answer to his future at Man United. The FA Cup trophy doesn't offer any guarantees, and it seems Ten Hag will have to wait to see whether what he has accomplished so far could give him a third season.