A horror story is what my mother in law went thru/is going through.
She had her RNY 3 years ago. Was close to 300 pounds, 4'11, bmi 53. (Before she got big, when she was 18 she weighed like 90 pounds.) she got her surgery within 3 months of applying, and had a horrible slow recovery. She ended up staying in icu for over a week due to complications from the surgery. She couldn't eat a thing for months, couldn't keep anything down, constantly puked, didn't work because she was too sick to function. Finally months later she was able to start eating but every time she did, no matter what it was she violently puked. Going places with her was a nightmare because we always had to leave because she was so sick.
Now, 3 years post op, she weighs 100 pounds, if that, and is in worse health than before the surgery. She looks like a diseased sickly person. Not at all what you want to be after losing weight. Due to lack of Vitamins and nutrients she lost all her teeth, most pulled from being rotten, her face is sunken in so bad she looks like a skeleton, she is weaker than anyone i've ever met. Just today she couldn't open a jar of sauce that i barely touched it and it popped open. She never eats. and still pukes when she does. Her skin hangs so badly it's mindblowing. Her bones are so brittle according to her she re-breaks her rib once a month or so. She lost almost all her hair. She is full Hawaiian and had beautiful thick hair, now it's think and barely fits in a ponytail.
I have witnessed all this first hand. She was so much better overweight,. unhealthy, but a normal person. Her troubles made me think i never ever ever wanted this surgery, But after talking with her for hours i believe she doesn't try enough to take care of herself. She doesn't take vitamins, she doesn't go see a doctor for her troubles. I let what she is going through be a lesson that no matter what, with this surgery I have to be strong and keep a healthy lifestyle no matter what obstacles are thrown in my way.
What she is going through is a horror story to me and a nightmare. I love my teeth, and my hair, and even though i am over weight i value my health and my strength. May not be the horror story your looking for but is an example of a bad outcome and poorly taking care of yourself.