Hi there! First of all, you are one brave lady and I commend you on all your efforts. I think that you have done really well with nothing but help from QB.
I feel for you that your quilt has not met up with your expectations. It is probably the shiny fabric which has gone wavy perhaps with undoing and restitching especially as there appears to be quite a few bias lines with the triangles? Is there any way you can make tiny tucks to reign in the wavy edges? Perhaps even remove the border and quilt it down and adjust as you go? That may work or is it too wavy? Once it is quilted, the waviness may not be as noticeable. Just a suggestion and hope it helps.
It is a lovely concept and a good idea. The pattern is lovely. Best wishes.