Using 'detract from' can subtly imply that there's more good than bad in someone or something. Despite his achievements, the minor scandal detracted from his legacy.
Pro Tip 2/3
Partial Impact
'Detract from' implies a reduction in positivity or worth, not a complete loss. The worn seats detract from the comfort of the room.
Pro Tip 3/3
Nuanced Criticism
Use 'detract from' when offering a nuanced criticism that acknowledges positive aspects too. Your late arrival detracted from the otherwise smooth event.