Question

to bang your head against a brick wall - I've tried to tell her many times that she needs to start working harder, but I'm just banging my head against a brick wall. She takes no notice.  - He's just banging his head against a brick wall - there's no chance of him succeeding.  - My claim with Tesco car insurance was so frustrating that it felt like I was banging my head against a brick wall.  - With people like this it makes you want to give it all up because you’re only banging your head against a brick wall.

Accepted Answer

to feel frustrated because you are failing to do what you want to do; to have no chance of succeeding

Idiom	to bang your head against a brick wall
Definition	to feel frustrated because you are failing to do what you want to do; to have no chance of succeeding
Examples	- I've tried to tell her many times that she needs to start working harder, but I'm just banging my head against a brick wall. She takes no notice. - He's just banging his head against a brick wall - there's no chance of him succeeding. - My claim with Tesco car insurance was so frustrating that it felt like I was banging my head against a brick wall. - With people like this it makes you want to give it all up because you’re only banging your head against a brick wall.

Head Brick Banging Wall Chance Bang Feel Frustrated