I don't like Meteora at all but she really got cucked hard if you think about it, which I try not to.
300+ years of forced brainwashing and self-loathing and shit, then all that's erased which is also kinda shitty even though she gets to start over. Then after maybe 6 months, max, of being raised as the new princess and heir to magic that she won't even remember as a child or adult, magic is gone and so's her status as royalty and now she's just an ugly ordinary half-breed in a chaotic mashup dimension, with her whore mother and father who eats people. We don't even know if Mariposa in this universe would still be interested in being her friend, or if Star and her family are even going to stay in touch with Eclipsa, or what.
Also there's a universe where she starved for like 15 years, which she can't return to now anyway and which was also age-regressed out of her memory.
And I'm glad she didn't get to be the new princess because I don't even like her and I thought the idea of a spinoff about her was cancer, but I guess it is kind of depressing for her compared to Star/Moon/Eclipsa, who at least got to enjoy royalty and magic for a few solid decades. Like the entire reason she even got turned into a baby/was attacking the kingdom in the first place was for a new life as Butterfly royalty and she won't even remember that at all.
I dunno, man. I feel like she's just gonna end up loathing her mother and everyone involved if her entire history ever gets revealed to her when she's old enough to actually retain it. If Ecipsa doesn't just infantilize her every decade or so.