Complex sentence: Yzma orders Kronk to kill Pacha and Kuzco, but Kronk cannot bring himself to commit murder, which leads Yzma to insult Kronk and his cooking and dismissing him through a trap door, resigning to do it herself.
Split into simpler sentences: Yzma orders Kronk to kill Pacha and Kuzco, but Kronk cannot bring himself to commit murder, leading Yzma to insult Kronk and his cooking. Yzma then dismisses Kronk through a trap door, resigning to do it herself.