That's the beauty of football, because for me it's even good that united won because more competition to play might even give Liverpool a slow down on their pressure to successfully conquer the English premier league because I believe that would be the greatest target for them and even for kloop and if they succeed it would be as a farewell present for him as a job and time well spent at anfield since he has decided to leave after the end of season.
The positive thing from Liverpool's defeat in the FA Cup could be that Klopp can focus more on his squad to be able to play better in the competitions they are still participating in, namely the Premier League and European League. Moreover, currently the condition of the Liverpool squad is not completely fine. Several players are still injured and several main players are also susceptible to re-injury because they are just recovering. So focusing on the Premier League and European League may indeed be the best way for Liverpool.
And this is his last season at Liverpool so it is hoped that he can bring success at the end of this season to Liverpool. And so he can leave with pride.