Why are so many hires looking great on paper but failing after they start?

Over the past few weeks, we've been speaking with recruiters, founders, and businesses about hiring challenges.

One theme keeps coming up repeatedly:

Candidates are becoming better at presenting themselves online.

Strong resumes.
Polished LinkedIn profiles.
Impressive portfolios.
Well-crafted applications.

But several hiring managers shared the same concern:

Some candidates look exceptional during the hiring process, yet struggle to meet expectations once they start the role.

In some cases, hires are being replaced within weeks or months because the actual capability doesn't match the impression created during hiring.

The challenge isn't finding candidates anymore.

The challenge is knowing who can genuinely deliver what they claim.

For founders, recruiters, and businesses:

How are you validating candidate claims before making a hiring decision?