underappreciator 

one who does not give true value to a certain item of extreme value

Jasen did not give give my trade in it's proper value and blamed it on John, he is such an underappreciator!!!!

underappreciator by undervaluer July 16, 2013

Underappreciated 

Someone who never gets respect for how good they actually are at something.

Man, Adieny Hechavarría is so underappreciated. Why is he not a Gold Glove winner?

Underappreciated by The Beast (The Real One) September 16, 2020

Underappreciated 

How your girlfriend feels after you spend all of your savings on her.

Don't you have any more money, I'm so Underappreciated

Underappreciated by Your local church November 5, 2018