Dear Penster,
I agree with the others that you should set it aside for at least a month before you make any decisions. Your quilting is probably better than it seems right now. If you look at the quilt a month from now, you'll see it with fresher eyes and may find it to be quite acceptable. Or not. But you can decide then what you're willing to do about it.
Every time I reach the final steps of completing a quilt, I am hyper-critical of my work. Over the years, I've learned to step back and let some serious time elapse before I judge it again. Almost every time I've been surprised at the re-view to see how nice the quilt really is! Not perfect, of course, but gosh darned nice and perfectly serviceable.