Do you mean the British perception of the French during WW2?You mean like the Americans, and British, do about theirs?
That is the only negative perception of the French that comes to mind.
The defence of France was a disaster for both countries and both countries had to put a huge amount of spin on the events pretty much as soon as Dunkirk took place. 'Both proud nations which had just suffered a humiliating rout - that wasn't good for public consumption, so both nations tried to turn it into something different.
For example, 'the French' (some French) conveyed the notion that the British had abandoned them to save themselves. What they conveniently forgot was that the tactical blunders made by the French command meant we had no choice. Similarly, the British made no reference to the French fighting off Germans outside of Dunkirk while we escaped over the water.
I don't really understand the need for people to think their military is the best. Nations such as Britain, Germany and France were pretty evenly matched when you take into account army, navy, air force. 'Reason being, there wasn't too much of a wealth disparity between these nations and a similar amount of GDP went into the armed forces. Taking that into account, you'd win some and lose some. The only time one of these nations was at a huge disadvantage was Britain pre WW2 and that was because of our expenditure on the armed forces relative to Germany and France.
The French got it hugely wrong at the outset of WW2, just as they did at the outset of WW1, but this time the Germans weren't fighting a war on two fronts. It happens, though, can't get it right all of the time and it just so happens that the time they got it badly wrong is something we're all aware of because it's not that long ago.