I don’t think is a very good emoji, because maybe the facial expression is there but it’s small and dark, and looks like a guy making a slightly-scrunched-but-essentially-neutral facial expression. A WTF emoji should have a big extravagant expression
I think we’re running into a definition of fuck conflict here.
The way you want to say WTF and how you portray it has relevance.
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: