Ashley Giles admits he and the entire England squad are extremely frustrated at missing out on a place in the semi-finals of the World T20, despite some positive performances in Bangladesh.
England were eliminated on Saturday after suffering a nail-biting three-run defeat at the hands of South Africa in Chittagong.
This follows on from their excellent victory over Sri Lanka, and their bizarre defeat by New Zealand in a contest ruined by the weather - after England had started strongly with the bat.
Giles, the acting England coach following Andy Flower's resignation, admitted on Sunday: "It is pure frustration really.
"To play so positively with the bat in all three games and come up short was frustrating.
"After leaving Australia we knew we needed to be more aggressive, not lose too many wickets up front and express ourselves better.
"We did all that in the competition but there are still areas where we can improve - such as in the field and with the ball at times.
"Unfortunately, we have not put a perfect game together. Before the event started we fielded really well and bowled really well - but didn't get it quite right with the bat.
"And the opposite has happened in the World Cup."
As for Saturday's game, he added: "The conditions were difficult and the South Africans handled it better than us and De Villiers - you won't see many better T20 knocks than that.
"But there were quite a few positives overall. Hales played well, Mo Ali coming into the team and surprising us in a few ways and we had a good spirit and I can't knock the players."
As for getting the England coaching role full-time, Giles went on: "I'd like to do it long term."
England complete their World T20 campaign against the Netherlands on Monday in what is a dead rubber for both sides.
Despite that, Giles has warned his team not to take the task lightly.
"It is does represent a banana skin," he admitted. "I made it very clear as we left the ground on Saturday that we must prepare for this game as we would have if we'd won.
"Whether we're in the competition or out of it, winning games of cricket is important."