Finally, a place where I can post this paste. It's funny, EG1 sucked, EG2 redeemed Sunset and the idea of it, EG3 went in the wrong tonal direction but kept Sunset as a likable character, and you can't pay me enough to watch "EG 4: Sunset goes back to the pony world! Not to make nice with Celestia, not to meet her parents, not to eat grass or see her old friends or college professors if she didn't have any of those, but to meet Glimmer and take her into the Equestria Girls world so they can fight a shit villain and try to conflate the evil they once did while accidentally highlighting what a shit character Glimmer is!".
Starlight Glimmer is a bad character, and Sunset Shimmer is a better character.
I could write a good few thousand words on Glimmer as a villain, but the issue isn't what a dumb villain Starlight is, and how her terrible backstory turned what could have been a great villain into a bad joke almost as much as a badly-written and rushed redemption removed her reason to exist in the show's setting. I could also write quite a bit about how stupid it is that she has the magical power to fight Alicorn Princess Twilight Sparkle to a standstill, the reserves to do this multiple times in a day, the knowledge to create her own spells on the spot, and so on when Twilight's supposed to be the Embodiment of the Element of Magic, a student of Princess Celestia, the strongest Unicorn alive, etc. Twilight had to face character challenges related to this. What are they worth if she's not the strongest, or even anything remotely special when compared to a pony that can tear the Cutie Marks off multiple ponies like they're stickers, screw up the timeline multiple times in a day, without the changed timeline affecting herself, fight Alicorn Princess Twilight Sparkle to a standstill multiple times in a day, brainwash the minds of five of the Mane Six in less than a few seconds, move five billion times faster than the speed of light, and slay fire demons with her magic burning katana- whoops, my eyes drifted to the feat list for the wrong Mary Sue.
Glimmer… This post-redemption Glimmer? Take away her friendship with Trixie, her edgy best friend there to make her look better. Take away the headcanons her fans have invented for her, like the belief that she was bullied by her family or hometown for not being good enough once Sunburst was gone, or that she loves Moths because they remind her of herself: "Unloved byPost too long. Click here to view the full text.