The term 'unemployable' often implies a lasting problem that prevents someone from getting a job. His erratic behavior has rendered him unemployable in the industry.
Pro Tip 2/3
Stigma Awareness
Using 'unemployable' can carry a stigma, so be mindful of the sensitivity when discussing someone's job prospects. They stopped inviting him to job fairs, effectively branding him unemployable.
Pro Tip 3/3
Context Specific
'Unemployable' can vary in meaning depending on the job market or industry context. With the tech industry boom, manual laborers found themselves increasingly unemployable.