A negative or bad feedback at freelance sites means that your freelancing career is over.
You cannot continue to get jobs if you have a negative feedback [especially if you do not have any Good feedbacks].
A negative feedback at freelance site is a nightmare for all service providers. So you need to make sure that you never get any rating below 9 out of 10. That’s right: I suggest you never get a rating below 9, not even 8 out of 10. If you start to think that a 8 out of 10 rating is ok for you then you will start to put 80% [or may be less] of your efforts while doing jobs for online employers.
The result will be that, you will not complete the project with 100% accuracy as you will be expecting the buyer to give you an 8 out of 10 rating.
This is the worst thing that one can do. You cannot afford to take any risks. It is very much possible that a buyer will give you a rating of 1 [may be 2 or 3] out of 10 if you have done about 80% of the project correctly.
What will you do if this happens?
You will no longer be able to get work at a freelance site where you have got a Bad Rating and remember that you can only open One Account at any freelancing sites.