Set it aside. Do not look at it or think about it for 6 months. If you still don't like it, give it another fallow period. I have been known to pass things on unfinished when I could not accept the colors or values I had used. Someone else can love them, or they end up as potholders.
Another thing I have done is cut blocks like yours on the diagonal, and sashed them in another color. The original blah blocks could breathe and show themselves off next to the plain sashing.
If you want to try that, before you start, fold along diagonal, and place over a soft yellow, or maybe blue or cream. Play with the width, too.
I think you will end up surprising yourself.
I forgot who said this, on the board, but it has stayed with me as a great truth:
Not all quilts are going to be heirlooms.