aggro-defeatist

A overly aggressive externalization of frustration (typically verbal on social media) in the face of imminent defeat that contributes nothing towards improving the odds.

She went on an aggro-defeatist rant shaking her fists while wearing her women's march pink hat saying: "AARGH!!! Rowe v Wade will be overturned!! The world is going to sh*t!!! This is all Bernie, Trump, RBG, Biden, and Republican's fault. I hate the world!!!"