Although it maybe wrong to form a judgement of an airline solely on one flight, I believe the majority of people would do. In any service industry when there is a choice of providers, if you have a bad experience with one you will be more inclined to use the other providers in future, I believe. However I do accept that the best airlines are those which offer good service consistently, I was never disputing that!!!
I look forward (!) to going through CDG after those comments on it! Does LHR T4 compare any better??