bang (someone's) head against (a) brick wall

Traductions
биться головой об стену
Trying to convince him to change his mind is like banging your head against a brick wall.
Пытаться убедить его изменить своё мнение - всё равно что биться головой об стену.
Définitions
To repeatedly try to achieve something that is very difficult or impossible, often becoming frustrated because no progress is being made.