First Aaron - welcome to WGT.
One truth with this obsession is that you have to improve your equipment as your game grows. Accuracy comes with practice and upgraded equipment. Did you waste your credits? Not really - but I would caution you that inexpensive equipment really should not be expected to perform as well as the high end stuff.
FWIW, you look like you're doing pretty well for someone with your experience. My advice would be to keep accumulation credits and hold off on buying new clubs for a while. Use the cheap WGT balls, because you really will be wasting your credits on better balls (with the clubs that you have)
Look at joining a Country Club - fellow CC members will help you grow!!