Wow! It is hard enough to line up the points but you were also attempting to line up the elements of the fabric. You did a great job.
Looks like something out of Jinny Beyer's book "Encyclopedia of Quilt Blocks". Looks like one of her fabric lines as well. Hats off to you for attempting such a bugger. I think Jinny hand pieces her stuff like that.
Have you ever tried using glue instead of pins for something like that? I like Arlene's Tacky Glue. It is water soluble and very thick and sticky so a little tiny dot of it hold your pieces in place and when you stitch those points stay lined up! Try using it on your next tricky block like this, I think you will be pleased with the results.