I understand completely. I have taken a break from my wave flag I have been working on. The first time I tried quilting with a wave stitch and they looked terrible so I ripped out the 4 rows I had done then yesterday I decided to try STD and did one row and I didn't like that either. So now I am thinking of asking someone else to quilt it for me.. I am tired of messing with this one.
We all have those days and I have them more often then I care to think about then I go through a period I don't want to sew at all. I think just leave it for a day or two and try something else. Good luck .