The Survival of an Inferior

Samuel stares at the bloody battlefield beyond him.
A second ago, he was in his room and the next, he is in this foreign world.
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After years of hard work, Samuel finally defeated the last boss of the RPG game "Elvis Arcane", a game notorious for its hellish difficulty.

A job offer mysteriously pops up at the same time and Samuel, tempted by the wages, accepted it.

However, the next moment he wakes up in the game "Elvis Arcane" as an inferior subordinate of the main protagonist.

"Haha...I'm screwed." Samuel mumbles.

Can Samuel survive in this cruel world where the odds are against humanity?
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Warning! My story has hidden meanings behind my writing, which may seem like obvious plot holes, but is deliberately there for realism. Two examples are human behaviour and our main character's mental health.