How does Victor respond to their criticism of professors??? what is Victor's ultimate purpose to the pusuing science ???

The first person he encounters at Ingolstadt is Krempe, a professor of natural philosophy. This meeting is described as the work of an evil influence ­ the "Angel of Destruction." The professor is astounded at the absurd and outdated science that Victor has read in the past, and tells him to begin his studies completely anew. At first, the narrator is indifferent to the idea of returning to science: he has developed a deep contempt for natural philosophy and its uses. This changes, however, when Victor attends a lecture given by a professor named Waldman. Victor is completely enraptured by the ideas of Waldman, who believes that scientists can perform miracles, acquire unlimited powers, and "mock the invisible world with its own shadows." He decides to return to the study of natural philosophy at once; he visits Professor Waldman the following day to tell him that he has found a disciple in Victor Frankenstein.

Victor becomes obsessed with science. Victor develops a consuming interest in the structure of the human frame: he longs to determine what animates it, what constitutes the "principle of life." Seized by a "supernatural enthusiasm," he begins to explore life by studying its inevitable counterpart: death.