http://thedaoofdragonball.com/blog/news/dragonball-evolution-writer-apologizes-to-fans/
Full interview on that link. Here is a few small parts of it:
"I went into the project chasing after a big payday, not as a fan of the franchise but as a businessman taking on an assignment. I have learned that when you go into a creative endeavor without passion you come out with sub-optimal results, and sometimes flat out garbage. So I’m not blaming anyone for Dragonball but myself. As a fanboy of other series, I know what it’s like to have something you love and anticipate be so disappointing."
I'll give him credit for saying sorry at least....