Cant fight city hall

meaning its pointless to try and fight against whatever may be happening, be it losing a job, flunking a class, or breaking up with a girlfriend/boyfriend. Something
that is completely inevitable trying to fight against it happening is like taking on city hall, you will lose every time. City hall cant be beaten people, it just cant.

Guy 1: Wow so she broke up with you huh?
Guy 2: Yeh just broke the whole thing off, never really said why.
Guy: Think it was because your penis is so small?
Guy 1: Well mayby either way you cant fight city hall. Besides other women dont think that, take your mom for instance.
Guy 2: *punches Guy 1 in the face*

Worker 1: Son of a bitch! They changed policy again?!? I cant stand working here!
Worker 2: Yeh well what are you gonna do, you cant fight city hall.
Worker 1: Yeh your right, it could be worse at least my wife hasnt gained 20 lbs for every year we have been married, like your's has,...
Worker 2: *kicks worker 1 in the crotch as hard as he can*