你的真心被狗吃了
[nĭ de zhēn xīn bèi gŏu chī le]
'Your sincerity got eaten by dogs.' An expression implying that good intentions can be lost or wasted due to uncontrollable circumstances beyond personal will. This could mean efforts being undermined or misunderstood, expressing frustration or disbelief at situations turning out poorly even though there were true motives involved initially.