くせに

The word くせに can be used similarly to のに to express things like "even though", "in spite of", "and yet", and "although." It's a stronger word and tends to express frustration or disagreement with the situation. It can only be used in sentences that maintain the same subject throughout them - not in sentences where the subject changes after the くせに portion.

兄は自分で料理しないくせに、いつも私の作ったものに文句を言う。
My older brother doesn't cook for himself, and yet he always complains about the things I make.

リーさんは数学がきらいってくせに、クラスのあとで数学のクラブに行くんだよ。
Lee-san says he hates math, and yet after class he goes to the math club.

姉は怖くて夜眠れなくなるくせに、ホラムービーばかり見ている。
My older sister is scared and can't sleep at night, and yet horror movies are all she watches.

クリスはお金がないってくせに、この間新しいパソコンを買ってしまったんだ。
Chris says he has no money, and yet the other day he bought a new PC.