I agree with GP, most of these https://emojipedia.org/google/ are indistinguishable to me. Almost none of them look like their name "GRINNING FACE WITH SMILING EYES" looks to be in pain.
I realize that emojis are often replacing the body language queues we send each other, but they're significantly more ambiguous. There's maybe 5 faces :'( :( :) :* :/ that I use and that's about it. They seem to be sufficient to convey the additional emotional context for me.
That face is not disappointed but relieved. That face is 100% stricken with grief. That's the emoji I send to my wife when she texts me and says she's having a bad day.
Here's a short article I found on a few other misinterpreted emoji: https://www.wired.com/2015/05/using-emoji-wrong/
Similar things happen with other emojis -- for instance the one depicting a Peach. It's an old human tradition to make sexual puns out of our food. Since users see the pictures and not the underlying Unicode titles, users ascribe their own meaning to the images.
[0] http://money.cnn.com/2015/04/29/technology/eggplant-instagra...