Steve McClaren has admitted his tenure as England manager was a "big failure" and that he thinks about the experience every day.
McClaren lost his job in charge of the national team following their failure to qualify for Euro 2008 almost two years ago. The former Middlesbrough manager is now rebuilding his career as boss of Dutch side FC Twente but cannot escape the memories of one of his life's low points.
"It could have been one of the biggest and ends up one of the lowest," McClaren told BBC Football Focus.
"I don't think a day goes by that some aspect of the experience with England doesn't come flashing back to mind and teaching me a lesson, making me move on.
"It was a huge disappointment. I felt, as one would, I'd let down the nation because we didn't qualify.
"However people say it was this, that or the other, the responsibility was mine and mine alone. I had to take that.
"It wasn't pleasant, an experience I don't want to go through again, but it is one that has not quite killed me and makes me stronger."
McClaren made a big impression in his first season in Holland, guiding Twente to runners-up finishes in the Eredivisie and the KNVB Beker.
He insists, however, he is merely getting on with his job rather than trying to prove anyone wrong.
He added: "It is not a road to redemption, it is not to prove to anybody anything, it is really what I do. Generally, I have been quite successful at what I do."
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