The "someone" who rated your snippet a one is a coward, and those with cowardice aren't likely to make themselves reachable for a proper explanation and will usually remain in denial.

This happens to me a number of times for my own snippets, where I've had gotten high ratings, then out of the blue, someone else came along and lowered them out of spite because of his or her personal issues toward me.

It's a bad taste that "someone" has taken Hawkee's rating system as a way for an irresponsible self-gratification.