Ole Gunnar Solskjaer was disappointed with his sides effort as the Bluebirds went down 3 - 0 at Swansea.
"It hurts, of course, I hate losing, especially in games like this," he said.
"As anyone with Cardiff in their heart knows, there is nothing worse than losing this game.
"Every goal there is something you can point your finger at. The first goal was disappointing as we were just a split second late in all our decisions. That sets the tone for the rest of the half.
“Our dressing room was downbeat after a loss to our biggest enemy, but the players have another massive game coming up against Aston Villa on Tuesday night.
“They have to bounce back and win that one.
“Do they have the character and personality to do that? Yes they do, in my opinion.
“They certainly have the footballing ability.”
Garry Monk, in his first game in charge of Swansea delivered an inspiring reaction to the victory and explained the ethic that Swansea work to.
"The first principle here is hard work," he said. "That was the first words I said to the players.
"It is the only way you get where you want to get. That is the main principle we have always had here, and the style of play.
"But you have to understand it and implement it every single day and I told the players when they come into training everything else stops, it's about hard work what is going on in there.
"That's what I did this week, I did not give them time to think about what else was going on or what anyone has said. We wanted it to be quick, sharp and intense. But the players know that."
Monk explained that he had sort advice from former managers ahead of the game.
"I spoke to Brendan (Rodgers), I spoke to Roberto (Martinez) and I spoke to Kenny Jackett. All people who have been here," he said.
"The support I have had here has been magnificent.
"They gave me advice which I will keep to myself, but they are guys at the very top of their game and when they are giving you good advice and wishing you well and giving you little bits and bobs it can only help."