This. Her continuous appearances (in the main role, no less) only confirm she's someone's personal OC disguised as a character that was meant seriously. Her personality is honestly not that interesting, more obnoxious than anything else as was already said here, and her name just screams "unoriginality", given we already have names like "Twilight" and "Shimmer" (without going into the argument of that one's canonicality).
I mean she was a good "bug" but at some point she flew head first into an oncoming car's windshield and the wipers just can't make her go away without stopping the ride.
That said, the most annoying part about her are her "fans" (and I mean both of them). For some unknown reason they feel the need to shove her down everyone's throat with meaningless shitposting threads disguised to look like prompts for serious discussion. With their "newspeak" repeatedly using words like "micromen" and "small boys" and such, they make up one of the most aggravating and annoying parts of history of /mlp/'s shitposting episodes. In record short time they've managed to surpass both Dashfags and Rarifags combined, IWTCIRD, the chocolate milk tipping (as much fun as that one honestly was, in the beginning at least), christian/nun Shimmer, and HI ANON (Cadance&co), just to name a few. I'd say that's pretty impressive, in its own fucked up way, for two people.