I would just continue with the stitching in just this one direction. Nothing jumps out at me that makes this an awful looking quilt. The pictures shown look to be a beautiful quilt so throwing it away would be out of the question. I think you have done too much work to give that a thought. We are always more critical of our own work, so I would suggest finishing the quilt, put it away for awhile and you may feel differently when you take it out again.