Answer:
Self-serving bias
Step-by-step explanation:
Self-serving bias is considered as a cognitive bias that is being widely used in the field of "social psychology" and was proposed by Fritz Heider.
In psychology, the term self-serving bias is described as an individual's propensity of attributing a few positive events to his or her character yet attributes a few negative events to any of the external factors.
In the question above, the given statement represents the "self-serving bias".