I think your quilt looks fine. But it appears you may have used a polyester batting....I find them hard to work with as the cotton fabrics of the quilt do not have an affinity for the poly batt - they don't "attract" each other, don't stick together well. Cotton batting with cotton fabrics seems to keep my quilts flatter. Sometimes, in small pieces, all you have to do is press the layers together with your iron.
Jan in VA