Liverpool captain Virgil van Dijk hit out at Manchester United's tactics after Sunday's 0-0 draw.
Van Dijk questioned United's ambition following the stalemate.
Asked if he was frustrated, the captain replied: "100%. If you see how we played the game, we had most of the ball and created some opportunities. There was only one team trying to win the game.
"We want to win every game of course and that is why it is frustrating. Sometimes we shot too easy and could have passed on the overlap. The right decision was sometimes lacking.
"We carry on of course but it is frustrating because we were superior in all aspects. In the end they are buzzing with a point and we are disappointed with a point.
"Obviously they are not in the best phase. Coming here you are wary of the threat we have. We should have won it today. We have to learn from certain situations and I know we will.
"Last year we didn't come in with a good feeling towards the Manchester United game but we won the game convincingly, but last year doesn't count now."