Whirlpool was a SeaWing powered by greed and desire. His sole reason for working in the royal SeaWing family was to marry one of the queen's daughters (Anemone, more preferably over Tsunami), and later on usurp the throne.
Even during his job as a scribe and teacher, he did not have others' interest in mind, much less his pupils. His methods actively hindered the potential of his students, were more time-consuming, and inflexible for any dragon who performed under methods such as hands-on.