谢谢你用心良苦的骗我到底
[xiè xiè nĭ yòng xīn liáng kŭ de piàn wŏ dào dĭ]
It expresses sarcasm or bitterness. In a relationship where there is betrayal or deception, the person feels hurt but also grateful for those betrayals and deceptions because they let the person know the truth about others.