Related Clues:

• One dislikes half-hearted contributor to top fashion?
• Person with a jaded outlook
• Some fancy nickname for Cassandra
• One loathes half-hearted madman?
• Twitter malcontent
• Inapt anagram of "heart"
• One who's constantly talking smack
• One-star review writer
• Troll on a fan page
• Some fancy Nicaean philosopher
• One without a kind word to say
• Shade thrower
• One who has a pessimistic view of human goodness
• One 'whose faulty vision sees things as they are, not as they ought to be': Bierce
• Slice of delicacy nicked for one habitually scoffing