It seems like I misworded it a little bit–although not intentionally–but I still managed to express the point.
Here Oda says that his heart hurts that he failed to show things that the Anime managed to highlight. Oda essentially admits that the Anime is doing waaaaaaaay better job than he does, and he also admits that it hurts him. You might interpret it differently based on the way you view current one piece right now, but this is how I view it.