Toriyama basically stumbled into that redemption arc it’s hilarious It’s basically “have him get his ass kicked, make more mistakes, get his ass kicked some more. He has a baby and he kinda mellows out. Then he kinda blows up on everyone but it’s ok because you can literally wish them back. Then have him become self-aware and act selflessly. Then have him humble himself in the end by letting go of a grudge.” It was definitely not planned at all. It just flowed nicely. It wasn’t nuanced or anything but it DID feel like it was in-character throughout.