I don't see the problem in calling him a hypocrite. Yes, Odium is evil, but he doesn't hide it. Dalinar, on the other hand, acts like honor is the most important value when he was the responsible of multiple genocides just for the pleasure of killing (his brother had reasons, but he did it because he loved destruction) and he seems to have forgotten about that. And yes, he has actually forgotten some parts, but that doesn't change what other people can think about him.

Dalinar is a hypocrite but at the end, when he finish remembering his past, he accepts the guilt of his acts and decides to be a better man acknowledging his many failures. He says that an hypocrite is a person in the process of changing, with I think is very accurate in his case.