My friend need job advice. Anyone experience this situation? What to do?

I always advocate being self critical - ask him to reflect on why he can't stay in a job for long, it could be both internal (personal, character etc.) or external (job, boss, luck etc.) factors.

Persistently ask and you will know

Is your friend having some medical condition that he is not even aware of? Some medical condiiton causes learning disability and deters a person to focus on doing something, hence upsetting the employer.

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Continue to do your best and one day one of your employer will see that in you.