Fussy meaning is quite hard to grasp. It refers to someone who is exceptionally particular and judgmental. A persnickety individual tends to pay strict attention to detail and has high standards when it comes to quality and excellence. Their attention to detail can be viewed as laudable, but it can also lead to extreme disapproval and unnecessary dissatisfaction. Being persnickety is often connected with meticulous attention to detail but can also be seen as a type of pedantry.
persnickety in Traditional Chinese Cambridge Dictionary
