Allison has looked pretty dodgy this World Cup.
Goalkeepers usually have a bad World Cup for some reason. I've noticed that a lot of them blame the ball. FIFA always manufacture completely new footballs for every tournament, and they never behave like the one in the European leagues.
Granted, it might just be one of those things you say when you get embarassed in front of the world, but I reckon there's something to it. De Gea looked like a League One keeper this World Cup too.