The oxymoron "silent scream" in the paragraph highlights the inner turmoil and frustration the author experiences following their disappointment. While a scream typically conveys loudness and emotional outburst, the term "silent" juxtaposes this expectation, suggesting that the author feels unable to express their anguish verbally or externally. This choice of words effectively captures the complexity of their emotions, indicating that the intensity of their feelings cannot be adequately communicated to others, particularly to their parents, from whom they anticipate little empathy.
The role of the oxymoron underscores the theme of isolation that the author feels. By choosing to retreat to their room and express their dissatisfaction silently, the author communicates a sense of resignation and the inability to seek support from their family. The "silent scream" reflects a profound internal struggle, underscoring the disconnect between their emotional experience and the reality of their social environment. This reinforces the idea that sometimes, individuals grapple with deep feelings of disappointment alone, lacking the opportunity or courage to share their pain with those around them.