the.com/frustrated
The feeling of pushing a door clearly marked pull, forever.
means Upset and stuck because something is blocking you from doing or getting what you want.
from From Latin frustra, meaning in vain or to no purpose — the ancient Romans already knew the special agony of effort that goes nowhere.
Same rootFrustrate and frustum (geometry cone) share frustra.
PsychologyBlocked goals trigger the frustration-aggression response.
Not failureImplies you still want it; despair has quit.