Mismatch

Running a startup is like running a Linux Kernel. Early employees are important threads. Some founders go out to raise and then build an army of employees. They along with their investors for the hope of shipping product quickly.

Sadly it never works, one reason being expectation mismatch. Founder expects new hires to be as passionate as them because they are among the best paid in the industry. The employees join the company because of the noise and fundraising PR.