These bad actors overstress emotions and do not even come close to a genuine performance. Unfortunately, most fans of dubbed Anime don't mind the bad acting, instead they celebrate the campy-ness of the bad dubs. As long as this condition prevails there will be little interest in improving the quality of acting. Lack of Motivation Hardest to prove, easiest to deny, but in my mind, lack of motivation is the number one reason why American dubs are so bad. First of all, the Anime companies know that their biggest critics, Anime Fans, are hardly ever satisfied by dubbing efforts.
Good dubs seem to take more time and more money - both valuable commodities.
The answer invariably is to crank out the volume so the company can start selling the videos. I can't think of any truly positive motivation technique other than sheer pride, and money seems to be an adequate salve for that injury so far. If any of you readers think you have a brilliant idea, I'm hoping the industry is open to your suggestions.