There is one thing I've always told my beginning quilting students.....many, many renown creators have left work unfinished:
Shubert and Mozart, Mark Twain, Hemingway, and Chaucer, even DaVinci and Michelangelo! You would be in good company if you walked away, so to do or not to do, that is your question alone.
Sometimes, even though your quilt is not finished, you are finished with your quilt. It's okay.
Jan in VA