LOL Did I write this post????
Yes I often feel the same way!!
You have expressed many of my feelings in some sewing situations that I have experienced!! That's why it sometimes takes me a long time to finish a project and why I don't work with homespuns because the sometimes "wonkiness" and lines not lining up or being off can drive me a bit bonkers
I have made a few string quilts and they have been "controlled" using specific colorways. I love the look that is achieved by many but I have to admit that I do stress over placement and matching up points or block corners and ends. I really don't think I could do a "paper bag" project where you just grab and sew what comes out.
Can you post a pic? It sounds like a fun project with nice results