GMAT Pyramid Goes Like this
Fundamentals (Reading Speed, Quantitative Aptitude) -> GMAT Specific Knowledge (GMAT Strategy Guides) -> Solving Official GMAT Questions and fully understanding them(takes time solving Qs 2,3 times + Re-reading Strategy Guides) -> Pattern Recognition by giving full length tests or drilling questions.
You cannot jump to the last stage first. You need to build gradually.
It's easy to say you can't do it , you are not good enough. It's much harder to step in your shoes and achieve the improbable.