I am so freaking frustrated. How do you channel your frustration?

That actually works really well for me, also you can try to seperate yourself from the anger a bit by recognizing the underlying feeling that caused the anger in the first place (like hurt or shock) and try to focus on that feeling instead. I heard that it's healthy for us to do, but sometimes I feel like I'm just filled with adrenaline that has nowhere to go. Breaking stuff that has no value anyways helps.