captious (adj.)

• censorious
• contrary
• critic
• critical
• cynical
• demanding
• evasive
• exacting
• faultfinding
• finicky
• hairsplitting
• hypercritical
• irritable
• nagging
• niggling
• overcritical
• particular
• peevish
• pernickety
• perverse
• petty
• petulant
• picayune
• snappish
• snappy
• testy
• trifling
• trivial