People like this, with big egos have an inflated sense of self-importance, exaggerate achievements, crave admiration, and struggle with criticism, often masking underlying insecurity, leading to self-centered behavior, arrogance, and difficulty with compromise or empathy, as seen in narcissistic tendencies or a need for constant validation.
It's the little man syndrome.
Don't pay any attention to to little Jackie Zeta.
He suffers from narcissistic personality disorder due to his parent-child relationship where either too much adoration or too much criticism that will never match this child's actual experiences and achievements.