England coach Sven-Goran Eriksson laid into this players after Denmark scored four second-half goals to condemn them to their worst defeat in 25 years.
"I'm very sorry for the fans and I'm disappointed," said Eriksson. "I'm angry about the second-half - it was a disaster how we played football.
"I told the players that if we play football like that we can forget about the World Cup.
"We were not helping each other and were all over the place."
The defeat was England's heaviest since they May 1980 and Eriksson added: "We did nothing right in the second 45 minutes. I am upset about that.
"I was happy with the first half, I think we did well. I can't defend it or explain why we didn't do that in the second half."
England face a crunch World Cup qualifying game against Wales in Cardiff on 3 September.
Eriksson made no excuses for his players, adding: "They know how to play, with the right attitude and tactics but then come out in the second half it seems like a holiday.
FAMOUS ENGLAND SLIP-UPS
USA 1-0 England - World Cup 1950
England 0-0 Saudi Arabia - Friendly 1988
England 2-2 Macedonia - Euro C'ship qualifier 2002
USA 2-0 England - Friendly 1993
England 1-3 Australia - Friendly 2003
"But we are not going to play football like that when it comes to a qualification game. You can lose games but not like today."
Eriksson replaced striker Jermain Defoe with Michael Owen at half-time.
Owen is suspended for the match against Wales and Defoe was widely expected to play a large chunk of the game as he pressed his case for a place in the starting line-up.
But England play Northern Ireland four days after their meeting with Wales.
And Eriksson added; "The thinking about Michael Owen was not for Wales but he can play against Northern Ireland.
"I don't know how much football he will have before then. I thought I had to give him 45 minutes at least."
England skipper David Beckham said the defeat would not affect the team's confidence.
"It cannot affect confidence," said Beckham. "It is hard to take but it was a friendly match.
"The score does not do any damage for the future but at the moment it is hard to take.
"We have not taken the chance to take our efforts from the training ground on to the pitch. We did not play to our potential."
Goalkeeper David James was critical of his performance after conceding four second-half goals.
"It wasn't a good performance," James told BBC Radio Five Live. "Personally I have had a look at myself and the way I prepared for the game.
"It wasn't done right and I blame myself because I relaxed being the substitute goalkeeper.
"I didn't have the attention and detail I normally would have."
Denmark coach Morten Olsen celebrated his team's victory but insisted that he still considered England as one of the favourites for next summer's World Cup.
"We played a very good game but qualifying matches are something else. I think England are still a world-class team with world-class players. Every team has such a day," he said.
"Maybe it can be helpful to the England team. I think Sven-Goran Eriksson will use this game so his team will be ready for the Wales game.
"Results like this also depend on the other team and we played very well."