Krul provided an honest assessment of the Burnley game on Saturday.
Speaking to canaries.co.uk he said: “It's difficult to find words if I'm honest. I think we've let ourselves down a little bit over the last few weeks, I've said it before. At the start of the season I definitely thought we had enough in this squad to be staying up.
“There's obviously been more reasons, I don't want to chuck too many excuses on it but with injuries, seeing Zimbo [Christoph Zimmermann] back today is the only positive. We've definitely missed him this year, he's a rock.
“All centre-halves have been injured in some way this season and I think there's been a big doubt. To analyse today, you nearly can't.
“I'm really proud of the effort in the second-half, the way we defended with nine men, Ben [Godfrey] in particular blocking and heading everything with Zimbo. It's hard that he scored an own goal. If you go with nine men in the second-half, the game is over."