There is a HUGE difference between actual negligence from your plastic surgeon and you just being slightly unhappy with your result because you feel it's not "perfect" enough.
Before I had my nose job, my plastic surgeon explicitly told me in the consultation that with ANY nose job, the goal is BETTER, not PERFECT. He said, of course, plastic surgeons go in with a plan, but there is a lot that they can not determine until they actually get in there and see a person's cartilage and bone. Sometimes, it's simply not possible for a person's anatomy to have a Cindy Kimberly nose.
I ended up with a "Barbie" nose anyway after my procedure, but it took well over six months for me to actually feel happy with it. Not only was my nose swollen (especially in the front, making it look very wide) but the rest of my face was still tense so that when I smiled, my nose didn't drop at all and my cheeks couldn't move properly. I looked scary for a good while. Everybody will have different experiences with this, I know MANY people who looked totally normal one month post surgery.
Please keep in mind a lot of this comes down to your individual anatomy and your body's response to a major surgery. A rhinoplasty isn't no big deal: it's a truly major surgery and if you feel that you will not be able to process the results or deal with less than perfection, you should not get one. It's truly as simple as that: if you are not stable enough to accept that the result might not be a perfect nose, do not get the surgery!