Start with the wound

The strongest YC applications do not begin with TAM theatre. They begin with a wound the founders understand better than the market does. Describe the workflow, the broken workaround, the budget already being wasted, and why the user cannot ignore it anymore.

Proof beats polish

If a sentence could appear in ten other applications, cut it. Replace it with customer behavior, usage numbers, revenue, waitlists, or rejection lessons. The job is not to impress YC. The job is to make disbelief expensive.