Sorry, but anyone blaming a kit lens on a bad photograph is like a workman blaming his tools.
A DSLR is a very difficult item to pick up from scratch and take good pictures with. However, it's a very easy item to pick and up and start taking utterly awful photographs.
You hit the nail on the head. I have been reading this thread and only feel inclined to post when something sooooo utterly wrong is posted.
To the OP, Nikon or Canon. Both are great and both will give you good photos, but in the end, the shots are only as good as the photographer and the technique. I recommend Nikon because it suits my style of shooting. I defy any Canon user here to match the Nikon D3S in low light shooting. Commercially the D3S is the standard by which all consumer cameras are measured. However if you want to shoot video, Canon is the way to go. I tend to shoot fast moving object, street scenes, and low light often. The Nikon with the right lenses makes this possible for me. Also, I can take a slow lens (120-400mm Sigma, f4.5-5.6), push the ISO well into 8000 or even 10000 and catch my daughter deflecting a goal, all the while experiencing low noise. I don't know of any Canon that can do this. Sooo.. decide what you want to shoot, and let that be your guide.