Instagram username: Prefix bad for search results?

Hello,

I was wondering if adding things like "iam, real, official, its etc." in front of your username reduce visibility in search results.

And furthermore: Do things like dots and underscore have a negative effect on search results?

I know this is a platform specific question but I think it still fits under the term SEO.

This question popped up when I was trying to search for a famous youtuber and it was really hard to find him. When I found him I saw he added "real" in front of his regular name.

Example of usernames:

its_random

VS

iamrandom

VS

realrandom