In this passage, the narrator reflects on a person who seems to be intentionally portraying herself in an exaggerated and exaggeratedly unflattering way. It appears that her behavior is a way of expressing her inner struggles or feelings of isolation, rather than an honest representation of who she truly is. This act of self-caricature might be her method of coping with loneliness and disconnection from others.
She gave me the impression of someone engaged in giving a series of savage caricatures of herself - but this is common to most lonely people who feel that their true self can find no correspondence in another.
It suggests that people who are lonely often resort to such exaggerated portrayals to protect their inner selves from vulnerability or rejection. This behavior underscores the universal human desire for understanding and acceptance amid feelings of emotional isolation.