An act of revenge brought on by failure and frustration?

His every encounter with Archer seemed cursed, marked by failure and frustration.

The aide said the Senate was most likely motivated by frustration over the lack of progress.

He said earlier this season that the episode rendered him all but paralyzed by frustration and doubt.

The game ended with the usual mixed feelings: progress tainted by frustration.

Overcome by frustration, he spun away from the group, then pivoted back.

His blue eyes were still dark, fired by frustration.

Is this military aggression motivated by frustration with the sanctions or are there other factors?

Cut ties with a past marked by frustration and organizational chaos.

"In fact, as the days went by our rage and frustration just grew."