くせに
Usage
Although -; In spite of the fact that -; And yet -
The conjunction くせに is used when something commonly expected from information does not happen or is not the case. In most situations くせに expresses the speaker's anger, frustration or disagreement. This emotion is not directed toward the speaker himself, but toward the hearer or a third person. The topics of both clauses must be the same for this to work.
Used to express a feeling of discontent to say "one's status is not high enough and not qualified for that"
Examples
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 does not cook himself, but always complains about my food.
妹は怖くて夜眠れなくなるくせに、ホラームービーばかり見ている。
My younger sister is to afraid at night and cannot sleep at night, because she watches Horror movies all the time.