It's been said. In fact, I've probably said it. On balance, we were probably favourites and probably should have beat them on the night if we hadn't shat the bed in the last 20 minutes.
However, to say Argentina are bang average is nonsense. They're the current world cup holders and Copa America holders, now in a second successive world cup final, with some world class players, including the greatest player of all time (albeit in twilight years of his career).
Looking back, England clearly underestimated them, which was their biggest mistake. Even at half time the England assistant coach was talking about expecting England's Premier League fitness/power to shine through. It's clearly bollocks.
There's no shame in losing to Argentina. But there is major shame in the manner in which it happened.