My point is you can't buy skill or talent. A better camera doesn't allow you to take better pictures. Give an iPhone to someone with talent, and you'll still get a great image
But that's my point; a better camera WILL
allow you to take better pictures. It won't
cause you to, but the camera is not irrelevant to the process.
I just think the only sensible answer to the OP's question is "post some examples, and tell us what you were trying to achieve", because it is not right to assume that it's his skill and not his camera that's limiting him; we simply don't know. There are plenty of people, beginners included, who have the natural talent, but who are held back and frustrated by their gear. In fact, because natural talent is independent of knowledge, there are people who have the talent, are frustrated by the results they're getting, but who don't even know they're using the wrong tool!
The rest of us need to acquire the talent, which can be helped by having the right tool for the job.
All I'm trying to say is that I think this idea that gear doesn't matter is rubbish as a general principal. Yes, it's true in specific cases; if you don't have any eye for photography, gear won't solve your problem, but "learn to use the camera you already have before you move on" isn't universally good advise; sometimes "upgrade your camera, and you'll free up your talent" is better.
For years, having only a compact prevented me from thinking beyond the technicalities, because I was constantly fighting what I had. Now that I have the right tool, I don't need to think about that anymore. The technology just gets out of the way and let's me concentrate on the art. It lets me see a photo in my head, and know that I have the tools to create it in real life, within my limited skill set anyway. Before, I could see the photo, but could never create it.
As an engineer, that's quite a revelation, because I'm used to loving gadgets for the technologies sake, whereas now I genuinely find myself thinking of camera gear only as a means to an end. I now want lens X, Y or Z because I have a type of shot in mind that needs it, not because it's a stunning piece of engineering (even though it is!).
That's not to say the OP's camera does need changing. I don't know it, so take your word for it that it's perfectly good. My point is that until we see some shots, we just don't know what the problem is, and in fact it could easily be a case of using the wrong tool.