Was it the last straw on the Camel’s back?

Have you ever felt like: the problem you are facing is such that any permutation and combination of solutions cannot solve the mammoth problem he is beset with?

Though there are times where we might have been hopeful of our circumstances, there can be a point where we feel that our elasticity is broken. This can lead to feelings of hopelessness and may impede problem-solving efforts. 

This in particular can lead a person to a cognitive condition called cognitive rigidity or cognitive inflexibility. It involves a mindset where an individual becomes fixated on the idea that their problem is unsolvable regardless of potential solutions or approaches.