I'm sorry but that's really bollocks. Uruguay was our only proper "poor" performance and even then we came close to getting a result. We lost by ONE goal, one moment in each of those 2 games, it was very fine margins. We played far better football than in 2012 or 2010.
So England were not "proper poor" against the team which also failed to go through and against a team which had nothing to do but save energy for the knock-out stage. Just poor then?