I agree with the quality of life bit - I'm a proponent of not immediately giving up as I've had two animals with kinks and both survived to be healthy, thriving animals.
I would say it depends on the severity of the kink, whether it can eat, poop, etc. I had a boa with spinal deformities all down her body. One might have said she had neuro issues if they saw her for the first time: when you picked her up, she would always grip tightly, sometimes twisting herself all around and upside down. When she ate, she would sometimes flip her head upside down to swallow. When she was first out of her cage, she always wanted to slither backwards - it took her awhile to figure out how to go forward, but once she got straightened out she was fine.
She was six feet long, chunky and beautiful. I never had an issue with feeding her until the end. She always shed perfectly and on her own, and never had an issue with BMs. She was also super sweet, super calm, and more than once was used as an "ambassador" of sorts. I even took her into a disability studies class in college, and many folks there touched a snake for the first time.
Obviously we don't want an animal to suffer - but sometimes they should be given the benefit of the doubt.