There's no need for whatsoever to show off, so matter what level you might have attained in life, someone else has been there.

Unhealthy competitions really affect people that have the time and energy to look for it, gullible people too. When someone radiates any kind of energy and it's not being reciprocated, he of she will pause.
If you are actually showing off, I would so ignore you that you can only imagine. With time you will stop it.