The most destructive criticism is indifference.
At the end of each term students may anonymously evaluate the courses they have taken. Student feedback becomes available only if at least 25% of the students taking the course and at least 5 students take the trouble of filling in the questionnaire. The results are public if the course instructor agrees to this, and even then only for those who can access ETR/Neptun. So here they are for those who can't. (The evaluations are in Hungarian. They were saved from ETR/Neptun, so the links in these pages are dead.)