Why does everybody hate this game so much?
This game has all your favourite Dragonball Z characters, (Goku, Gohan, Vegeta, Picolo, Trunks) that you can play is. In story mode, you can't choose who you play as, but once you beat the game, there is a mode where you can go through the game with any character you want. I suggest you choose Broly, he's super saiyan for the whole game.
You might not like this game, but it's only my opinion. Try it and see for yourself.