Those who are weakest often tend to blame others for their own incompetence.

On the roads of failure, it is not uncommon to see the tears of the talented; and in the land of success, to hear the victorious screams of the incompetent!

Umpires are umpires, but he (Smith) was just incompetent.

Redd turned to her assassins. "What is it I always say?"
The Cat, Sacrenoir, and the others bandied uncertain glances about.
"Don’t be stupid?" ventured Alistaire.
"I should kill you now?" offered The Cat.
"Do I have to murder everyone myself?" tried Siren.
"No, idiots! When in doubt, go for the head. That’s what I always say.

Violence is the last refuge of the incompetent.

Talentless and incompetent as I am, there are two things I can do, and two things only: walk, with my own two feet; compose, composing my poems.