I never had staples but stitches that wer removed 5days after op. I also had laparotomy, my 1st surgery, 8stitches but the last part of incision was not stitched, left open 2heal on its own. My mum would wipe my wound with warm salt water, apply betadine &cover it with gause. Im not sure why your doc said not 2put anything on it but salt water heals, hope that helps u.
This sound much worse than average. I did not have staples myself, but most do not report this sort of horror story, either. Your concerns should be addressed with your doctor.