I really, honestly love the horrible little creature. His perpetual attitude of entitlement amuses me, because you know he's riding for a fall. And since his mother is Talia Al Ghul I figure he gets to be excused a lot, because that woman is seven different kinds of crazy, and must have filled his skull with all sort of poisonous rubbish. Plus, he's only nine. Most nine year old boys are mean little buggers.
I feel bad for Tim, but I've never been particularly attached to him, and have to wonder why he's letting the wee brat get to him so badly. I can only assume it must be poor writing/characterisation, because he's always seemed one of the more stable members of the Bat-clan before this point.