Self-centeredness 

Self-centeredness is defined as being preoccupied only with oneself or one's own affairs. It is more of being too interested in yourself and not caring about the needs or feelings of other people. -Emeasoba George

Self-centeredness is synonymous with self-obsession.

Self-centeredness by Emeasoba George July 26, 2018

Tower of Self-Centeredness 

When someone is being extremely egoistic, they think/speak/act from their tower of self-centeredness

Sam: If I cannot get it, I don't know how anyone can get it.
John: Ok Sam, let me know when you get down from your tower of self-centeredness

------

His tower of self-centeredness is so high that he looks at other people as ants

Tower of Self-Centeredness by selfcenteredguy July 28, 2010