Eoin Morgan blamed a "terrible" performance with the bat for England's defeat in the World Twenty20 final against West Indies.
England struggled early on at Eden Gardens as they were reduced to 23-3 in the fifth over, the skipper falling for five after Alex Hales and Jason Roy had also departed cheaply.
A fluent 54 from Joe Root, together with handy contributions from Jos Buttler (36) and David Willey (21), helped Morgan's men recover to post 155-9.
That total looked as though it might be enough when West Indies began the final over of their chase still 19 runs short of victory, despite Marlon Samuels' unbeaten 85.
However, Carlos Brathwaite (34 not out from 10 balls) delivered a sensational twist - striking Ben Stokes for four successive sixes to reclaim the title for the 2012 champions.
"I thought we let ourselves down tremendously with the bat, I thought we were terrible," Morgan told a news conference.
"We were probably 40 short. I thought both sides let themselves down with the bat, but playing in a World Cup you make what you can of it.
"Cricket can be a cruel game. I thought we did extremely well with the ball, at no stage did West Indies get ahead of where we would like them to be.
"I can't fault anything we did with the ball or in the field, I thought we were exceptional.
"There was a tremendous amount of belief at the halfway stage that we'd put a score on the board, and if we could do something like we have done in the past we were right in the game."
Morgan refused to attribute blame to Stokes and hopes England can build on the potential they showed in India.
The captain added: "He [Stokes] is going to be devastated, it'll take its toll in the next couple of days.
"But we share everything we do, we stick together as a side. We share the pain, we share our success, I hope in the future we have a lot more success, I personally think we will.
"I think this side is at the very beginning of its progression, and it's frightening to think what we can do if we achieve our potential."