Klopp had his own intention different from Ten Hag intention so I see no reason blaming klopp, although Liverpool also had every chance of winning like Manchester united, let's not judge thinking only Manchester united had all the chance meanwhile Liverpool never used their opportunity right, Manchester united played excellent and I got surprised with their performance, I strongly believe ten hag played just little role in united success against Liverpool. Let's just accept the fact Liverpool tried their best but still it was not enough and stop blaming klopp.
Overall, IMO, Klopp is better than Ten Haag, we really can't judge MU success in winning the match against Liverpool as Ten Haag overall success in the EPL. However, in Liverpool history, Klopp has given Liverpool the important title they have always wanted, the EPL Trophy. Meanwhile, Ten Haag still hasn't been able to prove the effectiveness of his strategy in the EPL so far. I'm not saying Ten Haag is very bad, but it's not right to compare him with Klopp, who has been at Liverpool for several seasons. And we can't blame Klopp for losing results against MU, even Liverpool losing their 1st position.
After all, Liverpool have won 1 trophy this season and that happened last month through Liverpool victory in the Carabao Cup. So, if in the FA Cup Liverpool fails to get the trophy then yes, basically it doesn't matter at all because after all, eventhough Manchester United managed to get rid of Liverpool in this FA Cup but yes, of course there is still no guarantee for Manchester United to get thetrophy. Also, even though Liverpool failed in the FA Cup, in reality Liverpool still has a big chance of getting trophies in the Premier League and also in the European League. Therefore, it is clear that Liverpool is still better than Manchester United, and that includes Klopp and Erik ten Hag, it is clear that Klopp has good and great qualities and achievements with Liverpool.