Concerned with his own academic flaws and weaknesses, Preston often aggressively lashes out at his instructors via his evaluations of their teaching ability on instructor rating websites and during class teaching evaluations. This is an example of which Freudian defense mechanism?

Projection

Explanation:

Sigmund Freud was one of the famous psychologists who has described the defense mechanism and included ten different types of defense mechanism in his work.

Projection: The psychological projection is one of the defense mechanisms that an individual uses or employs to deal with unwanted or difficult emotions or feelings. In psychological projection, an individual blames or projects the unwanted emotions or feelings on the other person instead of dealing with these unwanted emotions or feelings.

In the question above, The given example illustrates the psychological projection of the Freudian defense mechanism.