"Never mind, forget it."

"I didn't expect much."

"I didn't expect this."

"Maybe I'm naive."

"What do you think?"

"It seems that our ideas are different."

"This is completely different from what I thought before."

"Maybe we should reconsider."

"I still need to think about it."

"I hope it will be better next time."

These sentences all express disappointment and dissatisfaction with something or someone. In daily communication, if there are similar hints, we can try to communicate effectively according to the specific situation, clarify the expectations and needs of the other party, and avoid misunderstandings and conflicts.