When you put what you make (or don't make, as some people just steal stuff) on the web, you gotta be prepared for negative reactions to. People don't need to apologize for that, no mather how crudely they put their dislike. Because for god's sake: PEOPLE MAY DISLIKE YOUR WORK AND TELL YOU THIS. AND YOU NEED TO QUIT THE ILLUSION THAT PRAISE IS THE ONLY REACTION THAT IS DECENT!
Your response to someone who types that kind of thing is to ask for an apology??!? Do those kind of words sound like they came from someone who gives a shit? What should you do! Hide the comment, block the guy, quit? Reconsider the meaning of life? Surely.