Complex sentence: After being beaten by the similarly attractive and demure Rouge, he wasn't content with simply allowing her helpless human form to fall to her death, he wanted to feel her dying as he personally crushed her body in his hand.
Split into simpler sentences: After being beaten by the similarly attractive and demure Rouge, he wasn't content with simply allowing her helpless human form to fall to her death. He wanted to feel her dying as he personally crushed her body in his hand.