Let me preface this by saying that as an author, ALL reviews are appreciated (and read)—even the much-dreaded 1-star review—because it means A) someone has read my book and B) taken the time to post a review on Amazon, Goodreads, B&N or Kobo.
That doesn’t mean that 1-star reviews don’t sting.
It’s akin to telling someone their child is too ugly to appear in public.
It might even be like saying they shouldn’t have had a child. In short, it’s harsh.