French doctor, you might want to take a vacation. Being that bitter and pessimistic is self destructive.
Actually, I consider that being bitter, sarcastic and conservative (*), very critical about "innovative," "excellence," "inter-trans-meta" kind of blurb, and also full of doubt about modern theories (especially in education) is part of my work as a scholar.
I partially agree with you. Being critical and skeptical are important parts of being a scholar, absolutely. But you must distinguish critical thinking from the habit of automatically dismissing every different viewpoint as rubbish from an inferior mind.
I disagree that bitterness, sarcasm, and cynicism are necessary, and would re-state my argument that these attitudes are self-destructive. At least in my academic career, I have found that I'm a better scholar, more creative, and open to new ideas, when my mind is not clouded with negativity. Yes, it is a hard life and it is very easy to fall into bitterness and cynicism, but no matter how much fault you find in the system, it will not change. You (in the generic sense) are the one who has to adapt.