What events in Chapter 8 of The Kite Runner show Amir in an unfavourable light?

Hassan asked Amir to climb the hill with him and read to him. When they reached their favorite spot, Amir changed his mind and the boys walked back down. After that incident, Amir's memories of the winter of 1975 are unclear. He could not wait for winter to end and school to begin, even though he had fun with Baba. He made sure to never be in the same room as Hassan, although his loyal friend kept trying to make things better between them. One day, after Amir refused to walk to the market with him, Hassan asked Amir what he had done wrong. Amir told Hassan that he should stop harassing him.

One day, Amir asked Hassan to climb the hill with him to hear a new story. Hassan joined him eagerly. After they picked pomegranates, Amir asked Hassan what he would do if he threw a pomegranate at him. When Hassan said nothing, he threw the fruit at him and demanded that Hassan throw one back. As Hassan refused to fight back, Amir threw countless pomegranates at him until he was stained in blood-red juice. Finally, Hassan smashed a pomegranate against his own forehead and asked, "Are you satisfied? Do you feel better?" before leaving.