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Stuart Lancaster admitted it would hard to contemplate a future where he is not England's head coach but conceded: "I understand it's a results business."
Lancaster said he was buoyed the support he and the England team had received in the week building up to the 60-3 victory over Uruguay at the City of Manchester Stadium, despite the hosts' failure at the Rugby World Cup.
The Rugby Football Union is to carry out a review into England's failure at the tournament and Lancaster's position as head coach is under serious threat despite having a contract until 2020.
Lancaster said: "I think anyone in my position who has worked since December 2011 to this point would say it would be hard to walk away from but I understand it's a results business.
"It's not just what's in my mind, there's a lot of other people who are going to have a say but it has been a tough week and I just wanted to get it over with.
"A lot has been going on this week, there have been a lot of people with opinions and what I have tried to do is make sure the culture of the team remains the same. Other teams under this type of pressure and scrutiny might have cracked but I don't think we did.
"It has been a tough week for the players and certainly the reaction of the crowd was a lift, I thought the crowd were brilliant tonight."
England scored 10 tries against Uruguay including hat-tricks by 37-year-old Nick Easter and Jack Nowell, plus a first international try for Henry Slade.
Lancaster said he still believed in his "core values" but that England had suffered from failing to "nail" key moments in big games.
He added: "Certainly I have worked hard and tried to do the right thing and make the right decisions on the core values.
"I went to Eccles rugby club this week and lots of people came and said 'we are behind you and the team because we like what the team stands for'.
"Some people might think it's old fashioned but I think it's right.
"We have not nailed every big moment in every big game and I think that has hurt us."
Wales' defeat to Australia meant that England would have gone through on bonus points had they kicked a late penalty against the Welsh and drawn the game instead of choosing to take a line-out and go for the try and a victory.
Lancaster, however, refused to dwell on what might have been.
He said: "What frustrates me more is that we were 22-12 up and dominating for 60-odd minutes playing good Test match rugby in a high-pressure atmosphere and we let that slip. That frustration will be there for ever.
"One thing that will help the players is the Premiership starting again next week and most of them are going to go straight back into it.
"It's slightly different for coaches... you've got to wait a long time potentially... only joking.
"Players can get back on and play but I don't think the pain of this will ever go away."