You have 300 keywords, where did you get those keywords from? Are all of them relevant to your niche? If you already saw your QS was bad, you shouldnt have wasted time making ad copy for a keyword that sucks. Your keywords arent relevant to your niche, or your LP sucks. If you dont think so then type one of your shit keywords into google and click on one of the sponsered links. I bet the page will be different then your LP. Good luck!