shoot the messenger
US /ʃuːt ðə ˈmes.ɪn.dʒər/
UK /ʃuːt ðə ˈmes.ɪn.dʒər/

1.
迁怒于传话人, 责怪报信人
to blame or punish the person who delivers bad news, rather than addressing the problem itself
:
•
Don't shoot the messenger; I'm just telling you what the boss said.
不要迁怒于传话人;我只是告诉你老板说了什么。
•
The manager was angry about the bad sales figures, but he shouldn't have shot the messenger by yelling at his assistant.
经理对糟糕的销售数据很生气,但他不应该通过对助理大喊大叫来迁怒于传话人。