"I wish I'd have won the league but you've given it everything and done as much as you can in terms of what you put into it," said the centre-back, who will bow out at Anfield in his 737th and final match for the club against QPR.
"We weren't good enough, all of us. It's very simple, there's no fancy reason or excuse, other teams in that particular season were better than us.
"It's not something I lose sleep over, I've been very lucky to achieve some of the things I have.
"If you look at everyone there's always something someone hasn't done.
"There's always more to achieve, whatever you've done. I'm pleased with how it's gone.
"If someone had offered me to be here until the end of my career - the trophies, the big games we've played and won, the stadiums I've played in - I'd have bitten their hand off for that."
Asked for his highlight, he stressed there was no contest.
"Istanbul, nothing will beat that - the Champions League final," he added.
"It's difficult to ever top that. We've never won the league, which is a disappointment; if we'd have won that maybe I could have compared the two.
"We've won FA Cups, Carling Cups, the UEFA Cup but nothing compared to the Champions League.
"It's the biggest and best trophy that you can win as a footballer in club football. It's what we achieved.
"It's a team game; there are different managers and coaches who have helped you along the way, you do your best - I've done all right."