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.
Everyone also knows that Jurgen Klopp is better than Erik ten Hag and maybe his fans are exaggerating just because they managed to get rid of Liverpool in the FA Cup match. It must be admitted that this time Jurgen Kloop lost and I think that is a normal thing in football when the results are not as expected. But if you look back, there are quite a few contributions that Jurgen Kloop has made to Liverpool. As you said, winning the EPL is something Liverpool have longed for for so long and they can feel it again after Jurgen Kloop arrived at Anfield.
But not only that, the young squad that Jurgen Klopp has built in the past few years is also very special and has transformed into extraordinary players. I think his legacy will continue even if Jurgen Klopp leaves at the end of the season and I think Erik ten Hag has just started at Manchester United and still needs more time like Jurgen Kloop did for Liverpool.