Instead of wanting your username to be changed, why don't you consider it a part of you? The internet is a very big part of the world today, and having an online identity becomes a part of a person.
the point is he feels disassociated while online.. this is a common occurrence as most people completely lose accountability.
Is that a problem of ego? People need millions of strangers to know who they are? You can't lose accountability on the internet, because it's fairly nonexistent.
Um.. not sure if it's an ego issue.. The identity is closely tied to individual progress..
From what I can tell, the OP comes from an affluent background, so he is likely struggling with the fact that he can not readily improve his life.. This would mean that he lives with a sense of stagnation devoid of forward momentum..
This is the same reasoning/motivation that drives people to collect "stuff"/materialism in the first place..
Because they want to see progress in their life, and buying more things is a way to "track" such progress.
Even though beyond a certain point, if the material items you collect has zero utility and YOU KNOW IT... the system is again broken.
This is where the "live in the moment" crowd start to develop..