I'm not sure why you singled out Kaplan as the reason you didn't pass. You failed because you didn't correctly answer the required number of questions. That has nothing to do with Kaplan. All NCLEX study aids, and, indeed, the NCLEX itself, are dependant on you understanding what question is being asked. I, personally, found those study aids to be a joke. NCLEX questions are written in a way that the answer is in the question, and it is up to you to decipher what the question is. It's Critical Thinking 101, and if you have relied on "study aids" to pass, you'll likely continue to be disappointed.
Instead, I would suggest that you get your hands on 50-100 actual NCLEX questions. Black out the answers, and then try to decipher exactly what is being asked in each one. Even if the answer isn't clear, once you understand how the question is written, and what is is asking for, you'll be better prepared to answer it.