Enduring social pressure and mockery from a hostile environment is one of the greatest tests of a person's loyalty to their path. Standing firm in the face of continuous contempt shows absolute devotion to one's values, even when the personal cost is heavy.
The primary approach among commentators is that wicked and sinful people [ביאור שטיינזלץ] relentlessly ridiculed the psalmist [אבן עזרא, מצודת ציון, מלבי״ם באור המילות]. This intense mockery was directed at his deep dedication to studying the Torah, his personal conduct, and his way of life. Despite suffering such humiliation, he completely ignored his tormentors and refused to turn away from the Torah [רד״ק, מאירי, מצודת דוד, ביאור שטיינזלץ].
Others emphasize that this ridicule was aimed at him precisely because he refused to stray from the path of the Torah. This experience mirrors the insults King David endured from Shimei ben Gera, who cursed him as a man of blood and a worthless man [מלבי״ם].
Beyond verbal abuse, the wicked pushed the psalmist into actual distress. Yet, even in the midst of this suffering, he maintained his loyalty to the Torah on two distinct levels. On a practical level, he refused to be dragged into violence and did not rise up to kill those who persecuted him. On a spiritual level, he maintained his faith, never questioning God's ways or doubting His absolute justice [אלשיך].