When expressing the view that someone is always keen to help others, you need to be cautious in using sarcastic language so as not to hurt the feelings of others. The following are some more gentle and sarcastic expressions： 1. ** "He is really a modern version of Lei Feng, but his ‘good deeds’ sometimes make people think if he is acting in a charity show. ”** - This sentence ostensibly praises the opponent's good deeds, but actually implies that the opponent's behavior may be a little contrived or excessive. 2. **"He is always helpful, as if all the troubles in the world are waiting for him to save. ”** -This sentence, through exaggeration, implies that the other party may be a little self-righteous and think that he is indispensable. 3. **"He is really a living bodhisattva, but sometimes his 'compassion’ makes people wonder if he is brushing his sense of existence. ”** - This sentence ostensibly praises the other party's kindness, but actually implies that the other party's behavior may be somewhat self-centered. 4. **"He is always the first to rush to help, as if there is no problem in the world that he can't solve. ”** - This sentence is exaggerated, suggesting that the other party may be a little overconfident or arrogant. 5. **"He is really warm-hearted, but his 'enthusiasm’ sometimes makes people feel if he is looking for a feeling of being needed. ”** - This sentence ostensibly praises the opponent's enthusiasm, but in fact it implies that the opponent's behavior may be somewhat out of self-satisfaction. It should be noted that although sarcasm can express some kind of dissatisfaction or criticism, it can also easily cause misunderstanding or harm to others. When expressing opinions, it is best to use a constructive and respectful approach, and avoid using too sharp or negative rhetoric.