Particular meaning is reasonably hard to grasp. It refers to someone who is immensely particular and disapproving. A persnickety individual typically nitpick and sets the bar high when it comes to criteria and flawlessness. Their attention to detail can be viewed as laudable, but it can also exacerbate overly demanding censure and unjustified dissatisfaction. Being persnickety is commonly related to exact attention to detail but can also be seen as a type of pedantry.
