I think it makes sense to have character being the 'big bad' that actually has history with the characters
on the show. Not too many shows have that, you know: someone that seems good at first, bumps back and forth in the second season only to become the big bad in the third. It's been a long ride, and it only makes sense for Ward to hold a grudge. He's acted like **** in the first and second season, SHIELD/his team punishes him for that, and he can't handle that (as he can't really handle
anything it seems).
I love this show, and how there's so much discussion on the internet on how characters
should be