Your post was marvellous. I had complications after my surgery way back in 2003, when a screw was put through my spinal canal instead of through the pedicle. A couple of years later I had four or five prolapses. i.e.. just about everything and a bit more. Then my bladder froze, and large intestine stopped working. I was self catheterising, and three years ago was given an ileostomy, (not reversible) as my bladder had packed up altogether. I still have a lot of pain, but I get around, and like yourself I try to think positively. I had to stop work way back, but my life has filled up with other stuff, and I've moved on.
I hope you have continued to improve, and that you enjoy a reasonable quality of life.