be like running (one's) head against a stone wall

To be very frustrating and seemingly futile. Trying to understand this math equation is like running my head against a stone wall. Can you please help me? Some people are never going to agree with you on this, so I'm not surprised that trying to convince everyone is like running your head against a stone wall. I'm trying to get funding for my project, and it's been like running my head against a stone wall. So far, I've made only $20.

See also: head, like, running, stone, wall

See also:

like running (one's) head against a stone wall
be like running (one's) head against a (brick) wall
like running (one's) head against a (brick) wall
be like running (one's) head into a (brick) wall
like running (one's) head into a (brick) wall
be like beating (one's) head against a (brick) wall
be like beating (one's) head against the wall
be like hitting (one's) head against a (brick) wall
be like hitting (one's) head against the wall
like hitting (one's) head against the wall

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