That's why I'm so confused. You make statements like these:
A bully's greatest weakness is his own delusional belief that he's not weak himself.
If a bully was in a position of power he wouldn't need to bully others to reassure himself of it.
A truly powerful person doesn't need to put others down to build himself up. That's what a weak person does because a weak person needs to do it to make himself feel powerful.
Then you say that you yourself have been a bully, but none of the statements relate to your own actions. So why are you linking an article and making definitive statements like the ones I quoted when a single moment of actual thought would tell you that your own personal experiences don't support your statements?