Captain Eoin Morgan admitted after an early exit from the World Cup that England had failed to live up to his expectations.
Defeat by 15 runs to Bangladesh ended England's chances of qualifying for the quarter-finals as the Tigers and Sri Lanka joined tournament co-hosts Australia and New Zealand in progressing from Pool A.
And Morgan said: "My expectations were a lot higher than the way we've performed, so that's extremely disappointing.
"We picked guys who can play a brand of cricket that, if we performed, we could win this World Cup. Ultimately we haven't performed."
England restricted their opponents to 275, with James Anderson and Moeen Ali bowling tidily.
But despite half-centuries from Ian Bell and Jos Buttler and an unbeaten 42 from Chris Woakes, England were bowled out for 260, Rubel Hossain taking the last two wickets in three balls for figures of 4-53.
Morgan said: "I thought the guys bowled well, the Bangladeshi guys batted well but with a short boundary and the wicket the way it played, it was certainly within our reach.
"Today's an example where some of the guys performed but we didn't perform as a unit. We've done it for quite a while now. Since we landed in Australia we've tried to address that but it hasn't worked.
"It's pretty poor, to be knocked out of a World Cup this early is unbelievably disappointing.
"It's obviously a surprise that we're knocked out this early. There'll be a lot of questions over the next few weeks as to what happened and what went wrong, and then we'll go from there.
"I'm gutted at the moment, we've struggled and fallen away since we arrived here. One of our big things was to fight back and to try and get through to the quarter-finals and then from we could fight our way through the last three games, but it obviously that's not meant to be."
Bangladesh's win was set up by Mahmudullah's first one-day international century - also his country's first in a World Cup - while captain Mashrafe Mortaza picked up the wickets of Alex Hales and Joe Root before Rubel took centre stage.
Mortaza said: "Everyone's so proud. Thanks to the team management and coaching staff, they've put in really good effort with us, and obviously the boys.
"We thought (275) was pretty good, we had to bowl well and in the middle we bowled really well and put pressure back on England.
"Mahmudullah was tremendous, he showed what he's got in his first hundred for Bangladesh. Also Mushfiqur, I have to mention his name because he was absolutely brilliant.
"I have to say Rubel's name, he's very happy now, he got four wickets and they were very crucial wickets."
England looked to have been given a crucial lifeline in the 48th over when Tamim Iqbal dropped Woakes on the long-on boundary.
But England were unable to get the Warwickshire all-rounder back on strike and Mortaza was able to celebrate a place in the last eight as Rubel bowled Stuart Broad and then Anderson with excellent deliveries.
"Tamim felt really bad, he's one of the best fielders for us," he said of the nervy finale. "That happens in cricket but we ended on the winning side so we're very happy.
"It's amazing, it's for all the people at home working hard and out there supporting us. This is for you guys."