Either you don't have the competency required to pursue medicine or you didn't study efficiently. If your idea of studying is reading your MCAT book to learn the content or memorize, then that's probably why you did badly.
Hours don't matter.
1 hour of studying for me could be only 15 minutes of studying for another person. It also differs depending on how you study. I used to see many people at libraries with facebook open passively skimming through the textbooks. I also know of people that studied for MCAT simply by trying to memorize facts.
People might disagree with me, but I firmly believe that taking timed practice tests/drills is more important than content review. And when you take practice tests, you can better assess what you need review in, and your review becomes more pointed and efficient (not just aimlessly reading through a review book). In fact, if you actually spent 6 months studying 6 hours a day, you already have enough content review and you should forego the review and just practice until your next MCAT.
When you practice, you also need to review every question and every answer choice until you fully understand why the correct answer choice was correct and why the other answer choices were wrong.
If you truly studied the way I just mentioned and got that score, I would recommend a different field for you. I don't mean to be harsh, but I would not go into a professional school that is expensive and then end up realizing that I don't have the competency to graduate.