Popular western shows did; I've started watching the Gundam series, the first set started in '79 and while superficially it looks like your generic saturday morning cartoon, it starts off with trauma (many people killed) and while the villains are obviously evil - genocide, nazi ideologies ("sieg zeon"), etc - they also get more character development than what the protagonists get. The villains are the underdogs, only 1/30th the size of the "federation", and the good guys have a new set of superweapons that seems to win and kill their people on every occasion. There's two episodes where a "villain" character is introduced as a lover, ambitious military man, etc, then gets killed, his would-be wife killing herself in the next episode.
Anyway, that's just recent experience, I'm sure if you revisit some of the 80's / 90's shows you'd see more trauma / ambiguity too. I'm thinking of the X-Men series for example.