Which one of these made the worst performance: Italy, France or Korea DPR?

It's got to be Italy because Italy were the defending World champions and when you're the defending World champions you can't play the way they played. Other than that France were rubbish, but you can blame the manager for that, all though France are rubbish anyway, just that they should have at least made the last 16. Forget Korea DPR, nobody expected anything from them, so adding them to the list you might as well have added everybody else who went out.