I failed twice a total of six attempts. Yes, the training materials and boot camp events are nearly useless because the answer that you are looking for is not in the training material. Also, Copying questions and answers for the next attempt does not help much either because you don't know what questions were wrong or right. Exam feedbacks make it worse because you might change the correct answer choices.

Sometimes the answer choices make me wonder whether it was a typo. It feels like for whatever the reason, the system does not want me to pass the exam.

Sorry, I could not help you, but I feel your anger.