I see your point, and the show feels that way. However, the word "misunderstood" has a specific connotation. If someone is misunderstood, it means their bad reputation is somehow not their fault. Their actions would be excused if only people understood why they did them.
You're suggesting that the "misunderstood" angle is not the overall message here from the author's perspective (as it is in the Maleficent film) but instead a feeble protest from the villains: "Oh, we're just misunderstood, you see!" Then we laugh along and say, "nice try, villains."
OK, I think I buy that, especially if I could ever discern the dialogue from this recording...
Anyway, if they were going for comic, then I still think simply voting "Who's the baddest of all" would be more straightforward. They could then brag about their misdeeds, and we'd root for them in a truly ironic way. (The way I loved Darth Vader when I was only 8.)
As it is, are we voting for the character that makes the best case for their innocence? Seems a bit convoluted for kids. But again, I think this show is for those with a protracted adolescence.