Going from good to bad is a BIG development, and so what if he's whiney? He's the bad guy. Your critical analysis is absolutely lacking. He's in no way a Piccolo clone.Just because Vegeta went through a bad-guy-to-good-guy development, that doesn't automatically make him not a 2-dimensional character. When he was a villain, the most his character was was a whiner. When he became good, he became a Piccolo-clone.
Your understanding of 2 vs. 3 dimensional characters is also lacking. We know what makes Vegeta tick, he has demons, he has contradictions, and he changes over the course of the series. In what world is that not a 3 dimensional character?
Fair enough but you keep making up these rules of writing, and they are wrong.But what significance happened to Chiatzou himself? He never developed as a character, he just went along with whatever Ten decided to do.

