Tiger Woods insisted defeat in the Ryder Cup hurt following questions over his commitment to the event.
The American won just two points in the 18½-9½ loss to Europe.
"I don't like losing," said Woods. "It doesn't feel good - never has. I don't know how many people enjoy losing, but I'm not one of those people.
"It's frustrating for us not to be holding the cup for our captain. We busted our tail and didn't get the job done. It's very disappointing."
The world number two has a Ryder Cup record of seven wins, two halves and 11 defeats.
He opened the competition at Oakland Hills in a high-profile partnership with Phil Mickelson that failed to ignite as expected.
But Woods put Europe's success down simply to better putting and rejected suggestions that the Americans struggled to perform as a team.
"I thought we gelled, but we just didn't make enough putts," said Woods.
"When it comes right down to it, if you look at the highlights of the Ryder Cup in general, you'll see the Europeans making a boat-load of putts.
"I think we hit the ball just as good, but you've got to make the putts."