I think the main problem is that you bought a plane that's beyond your skill level to start off with. The Stryker may look cool, but it also takes a skilled hand to fly it successfully.

Check my thread above for "Good First Planes." While a beginner plane may not look cool, remember that you don't look cool either when you're crashing that cool plane and smashing it to bits. While a beginner plane may not do all the aerobatic stunts, remember that neither can you. You need a stable platform to learn the basics on.