[Gohan78]

Kirino is a bad person because she doesn't ask for help, she demands it.
When she was confronting Ayase in the park, she cast a killer glare to Kyousuke like he was supposed to intervene, and as usual he took all the blame. Not a single word of thanks was uttered by her afterwards.
During their Xmas date, she commanded him to buy her a 30,000 Yen ring and complained when he didn't have enough money for it, even after he offered to pay 18,000 Yen, his whole allowance. How ungrateful can she be?
Oh, and the "dump truck joke" was terrible. How are we supposed to know it's a joke when she said it with a dead serious voice and expression? I don't know if this is the fault of the anime adaptation or not but here we are discussing the anime.
So far in the anime Kirino appears to be an awful, selfish person who doesn't deserve one bit of her brother's dedication.

P.S. Taiga was a saint compared to Kirino. Only Louise at her worst displays the same level of abuse towards the male lead as Kirino.