Lin Daiyu did not do anything to offend Yuan Chun in Dream of the Red Chamber. On the contrary, she was a very smart, kind and talented girl. Yuan Chun didn't like Lin Daiyu because she came from a noble family, but her background and character didn't match Yuan Chun's values. Yuan Chun believed that girls from noble families should remain noble, elegant, and quiet. They should not casually expose their family background and identity. Lin Daiyu, on the other hand, liked to make friends with commoners and liked to be lively and free. These behaviors made Yuan Chun feel that Lin Daiyu was not well-behaved enough and did not meet her standards. In addition, Lin Daiyu's personality was also very unique. She was kind, intelligent, and talented, but sometimes she would also show her emotional, impulsive, and selfish side, which made Yuan Chun dislike her even more. In summary, Lin Daiyu did not offend Yuan Chun in any specific way, but her background, personality, and behavior did not match Yuan Chun's values. This was the main reason why Yuan Chun did not like her.