I watched it after reading the comments saying that it was disturbing.
And I agree. It was disturbing. It's one thing to see abuse like that in canon for character developmemt's sake, and something totally different when it's so far off what the story should have been.
Every "dream" shown by Kishi was a fantasy of the person trapped in the genjutsu. Why did Karin have such a tragic and painful one? Why wasn't her fantasy shown? SP afraid of alienating the fans of SS? (since most of us could guess at the fantasy.)
Showing weird guys biting a little girl was too much like child abuse/pedophilia 2/5