Tumblr Leftists did commandeer the word from psychology and PTSD episodes, but in recent ears it became an insult used by internet right-wingers to mock the SJWs for their emotional tantrums in response to politics they didn't like. This woman is trying to use the word in the same way that right-wingers use it, instead of the SJW style, and thus is trying to turn the weapon around on its original users.

Additionally, the phrase doesn't even function in the context she's using it, further proving it's just an attempt to lash out and hurt someone in a way she I guarantee she has been belittled.