This place is rated $$, but it should be $$$$. I tried to "Suggest an Edit", but the dollar rating wasn't available to change.
I did some research and was again like yourself unable to find a valuable answer! Although I did come across this thread:
I read through this but it appears it's just a bunch of people either guesses or creating some kind of rank for this system.
The one that seemed most likely to me was this post:
"They indicate whether the items on a particular restaurant's menu are inexpensive ($), moderately priced ($$), or expensive ($$$).
I believe those indicators are culled from reviews, so to a certain extent they would be relative to the area in which the restaurant is located. But keep in mind reviews are subjective. If a restaurant had two reviews and one person thought it was $ while another thought it was $$$, the actual listing would average them out as $$. "
If you truly feel this way about the business try leaving a review that mentions this and if that doesn't change maybe shoot google a message about the business here:
Hopefully, this leads you in the right direction! All the best ~Ethan