New Broly is basically a wildman/caveman. living off the land in the wild with his fatherWell, there's many theories of why he hates Goku so much, the popular one is that the only thing he heard all these time after birth was crying of Goku and then doctors testing on him because of his high power level, then king vegeta stabbing him. He actually hates both Goku and Vegeta (like he says in FighterZ if Vegeta is on the team "Lending me a hand will not erase the sins...you and your father have committed!") and when fighting Vegeta he actually shows more malice than fighting Goku ("I'll make sure is your death is slow and painful")Broly lost his mind after all those years trapped in ice and became a maniac with the huge amount of Zenkai boost muddled his fragile state of mind, which his Sayian nature kept in check. so he went off in a rampageThis would have been his fate, if Bardock and the Sayian's overthrew Frieza, King Broly