6

What is a single word to describe a person who is quick to blame others or the system in almost any situation, regardless of whether that is legitimate or not?

10

You could call this person a finger-pointer, buck-passer, scape-goater or blame-shifter.

Alternatively, a shirker avoids things (usually work), or more generally a you could say they're a crybaby or are unprofessional.

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4

Reprehending is a good fit, but also...

an Imputing person or Accusatory or Denunciatory or Condemnatory / Condemning or animadverter (and so on)

(if accusations not true then Aspersive person or Maligning person)

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