(DISCLAIMER: I'm not sure if this applies to anyplace outside my country or with your family, but it applies to mine and a few of my friends. Sorry if I might have offended you with this post.)
I like Frazel, it's my favorite ship. It's very cute and is underrated. Many people say it's the most realistic, but it's sadly not as realistic as you all think.
The reason is Grandma Zhang.
Grandma Zhang is a Chinese who goes to the extent of calling Frank 'Fai' because 'Frank' is not a Chinese name. Most grandparents who are as much of a devout Chinese as that would not ship their grandson with anyone of another race.
As an Chinese person, I know my Chinese grandfather would never allow me to date/marry a person who didn't have any Chinese blood. In that side of my family, they would disown me if I married someone who wasn't Chinese.
As racist as it is, this is traced back to ancient China, where anyone not Chinese would be called a 'barbarian'.
Of course Grandma Zhang is an exception and there are also many Chinese grandparents or parents of exception to this. This is just my opinion of Frazel.