What does Holden's encounter with mr spencer tell us about him

Holden is finally told to leave school because of his bad marks. He visits Mr. Spencer, because he liked him and Mr. Spencer had sent him a note requesting a meeting. Holden is, however, repulsed by the meeting. Mr. Spencer shows up in his robe and looks like a withered old man. He begins to lecture Holden about getting good grades and responsibility. Holden cuts the meeting short. This tells us Holden cannot handle or even process criticism. Holden lacks the maturity to see his teacher as a person rather than a teacher archetype he has built in his head.