A woeful 4-1 loss at Tottenham left the Reds without a win in three league matches prior to Saturday's victory over the Terriers.
"Against Tottenham me and the rest of the team made mistakes and we got criticised. This is what it means to be at a big club, to be a professional footballer," he said.
"A lot of people are looking, they are waiting, and if we don't perform we expect them to do this.
"Of course it is tough. Are the criticisms always deserved? I don't know, maybe.
"We know we had a lot of problems. I made a lot of problems, I was at fault, I made a number of mistakes, and of course I am not happy.
"We know we did it wrong and he (Klopp) didn't hold back, he said it directly.
"You have to speak about these things directly, honestly, and that is what he did.
"He said it was not good enough - he spoke very honestly about the things that have to change, very directly, but after this he said we carry on and try to prepare for the next game."