Idiom or phrase associated with a person who blame others for his or her fault?
Is there an idiom or phrase associated with a person who can't do some work or something but he or she blames something or somebody else?
A bad workman blames his tools, might fit the bill:
something that you say when someone blames the objects they are using for their own mistakes.
- 'This oven burns everything.' 'You know what they say, a bad workman blames his tools.'
(Cambridge Idioms Dictionary)