Yeah, those who overrate themselves despite their lack of knowledge, skills and competence are super-annoying.

Dunning–Kruger Effect – Why Once a Fool, Always a Fool

The majority of people believe that they are better-than-average. In psychology, this phenomenon is called the illusory superiority. A specific form of illusory superiority is Dunning–Kruger’s effect which states that people overestimate their abilities based on their real abilities. The rule is that the less competent a person is, the more they overestimate themselves. And, on the other hand, able people have a tendency to underestimate themselves slightly. A considerable part of this phenomenon is also the fact that the less able people do not change their attitudes even after being confronted with the reality.

[psychologon.cz]