Question: why akira toriyama hates vegeta?
Answer: Toriyama doesn't necessarily hate Vegeta, but he didn't like him “all that much” and found him convenient to have around after the Saiyan arc. ... Vegeta got used as a plot device for Goku to learn from Vegeta's mistakes and it was a way that Goku was able to stay one step ahead of the Saiyan Prince.