This verse is part of a lament by the prophet Jeremiah, where he is cursing the day of his birth and wishing he had never been born. In this context, the verse "Cursed is the man who brought news to my father, saying, “A boy is born to you,” making him very glad" expresses a deep sense of anguish and regret.

Here's a breakdown of what it means:

"Cursed is the man who brought news to my father...": Jeremiah is cursing the messenger who brought the news of his birth to his father. This highlights his profound despair, extending his curse even to the innocent person who simply conveyed the information.
"...saying, 'A boy is born to you,'...": This is the specific piece of news that is being lamented. The birth of a son was typically a joyous occasion, bringing honor and continuing the family line.
"...making him very glad.": This emphasizes the happiness that Jeremiah's birth brought to his father. The fact that his birth was a source of joy for his father only intensifies Jeremiah's own sense of misery and the futility of his existence, as he feels his life has only brought him suffering and pain.

In essence, Jeremiah is saying: "Whoever told my father I was born, bringing him such joy, should be cursed because my life has been nothing but misery." It's a powerful expression of extreme negativity and a wish that he had never been born, stemming from the immense hardships and persecution he faced as a prophet delivering unpopular messages.