I know exactly how you feel, and even though I have written several stories I only ever posted one and took comments straight to heart and never tried again.
You know what? I let them win, and lost something that I really loved doing.
Don't let them win.
If all people can say is negative then it is not worth listening to at all and definitely does not deserve to control the talent that you clearly have.
Truth... I MISS READING YOUR STORY. I followed it in its original format and have been an avid supporter ever since. I will continue on my quest and every week search for your updates and new stories.
We need talent like you, some of the most famous classics almost ended up like you have described. Be like the famous authors and write to spite them
You will win.