United suffered a 2-0 defeat at Anfield on Sunday, following second-half goals from Fernando Torres and David Ngog.
“The advice was to play our football, but we didn’t do that and I don’t know why,” the full-back told MUTV.
“Liverpool were aggressive, but we didn’t play and that’s why it’s so frustrating to lose.”
He added: “Normally when United play we create at least five or six clear chances, but we only had the one when Valencia hit the crossbar. It’s not enough if you want to win against Liverpool.
“(Losing to Liverpool) is the most pain you can have when you play for United.
“There was a big silence in the dressing room afterwards and we will need a few days to recover from this big disappointment for us, for the staff, for the fans.
“Now I think we need to do what we did last year – win the league after losing to Liverpool. We also need to make sure we show the real United team at Old Trafford.”
“I don’t understand why Carragher only got a yellow card for fouling Owen when I think he was the last man,” continued Evra.
“I look more at the display of Manchester United and the display was poor.”
