In South Korea, gapjil is the exclusive term for workplace bullying, which refers to abusive behavior towards employees by those in power.
In fact, many times we are not frustrated because of our lack of ability, but for other reasons.
A "workplace persona" as a workplace survival technique is fine, but as a weapon to question everything, it does not help your progress.
The main reason why we get nervous is that we don't anticipate and prepare for the occasion and the content of the speech.