Here's why there's no clear-cut climax:
* No external conflict: The play focuses on Crabbe's internal struggles and his deteriorating mental state. There's no major external antagonist or conflict driving the plot.
* Gradual unraveling: The play follows Crabbe's emotional journey as he is increasingly isolated and haunted by his past. The play culminates in his suicide, but this is a gradual and inevitable outcome of his internal turmoil.
* Ambiguity: The play leaves much room for interpretation regarding Crabbe's motives and the nature of his despair. This ambiguity further removes the sense of a clear climax.
However, some might argue that the most intense moment in the play could be the scene where Crabbe finally decides to kill himself. It's a moment of profound despair and finality, but even then, it's not a sudden shift in the plot but rather the culmination of his long and agonizing journey.
Ultimately, the climax of "Crabbe" is more about the overall journey of the protagonist and his gradual descent into despair than any particular event or moment.