Originally Answered: Why is Broly so angry at Goku? He was traumatized as an innocent baby when King Vegeta had him stabbed in the stomach and thrown in a dumpster, he associates Goku/Kakarot’s annoying crying with that unfortunate trauma.
Goku. During Dragon Ball Z: Broly – The Legendary Super Saiyan, we learned that Broly hated Goku because of Goku’s constant crying when they were children. His screams and cries would ultimately drive baby Broly insane and he never forgot his dislike for his fellow Saiyan.
In this film, Broly doesn’t have a deep hatred for Goku, but he was raised on revenge due to the circumstances of his banishment, so his rage leads him to try and destroy our hero.