What are the sentences that express "give your heart to others, others don't appreciate it"?

1. As a representative of public opinion, he covered up his crime, which is cruel and heartless.

You promoted Xiao Huang, but he attacked you in front of Lao Wang. Such people are really heartless.

You traitor, cruel and heartless, betrayed your comrades who have trained you for many years.

Admit that you regret training such a heartless guy so carefully.

5, my brother won for you, and you are not reconciled. What a heartless man!

6, this ungrateful thing, even parents ignore it!

7. As soon as you took the presidency, you were proud of yourself and began to show your ingratitude.

8. I didn't expect my master Ye to be such a shameless villain. I want to see how my grandfather Ye Jia practices. My father gave up the position of Lord to such a heartless guy.

9. You heartless thing, I wasted all my good years on you. How dare you treat my mother like this? She is not much better than a rose.

10, human society is established by a small group of relatively powerful and great molecules, and their responsibility is not to let ruthless bad guys destroy their bleak business.

1 1. He is an ungrateful man and didn't lend a helping hand to Zhou Laobo who cultivated him.

12, I once poured out my heart to you, but you were cruel to me, which made me heartless now.

13, he treated the rescuer like this, so ungrateful, he will be punished by God sooner or later.

14, you should ask him for that cruel and heartless beast. Do you think he will help you? If he was really so kind, he wouldn't hurt me, I wouldn't be disabled, and I wouldn't end up in ruin.

15, it was his wife who used the money from going up the mountain to dig medicine for him to go to college. Who knows that after he graduated and entered the big city, he actually disliked his wife and asked for a divorce. What an ingrate!