I cringed every time they said "One world, one people". Even if they had good motivations on paper, I think because we didn't actually get to see the hardship of their displacement, they just come across as typical cheesy fake TV versions of freedom fighters, like naive teenagers playing anti-establishment punks when they really have no idea what they're talking about. It just made them irritating, not sympathetic. So yeah, the worst MCU villain by far. And I don't think it's a knock against the actress. Kellyman carries herself with a lot of strength despite her youth, and she pulls off that crazy look of self-belief. But without letting us feel and remember what she's gone through every time we see and her merry band of rebels, she just comes across as an annoying brat who likes the sound of her own voice, talking herself up for what she's done ("Our movement is bigger than us now", blah blah). I think, like in WandaVision, we needed a scene or montage when all the people came back from the Blip, where we got to see how it affected Karli, and we really feel the weight of what they're fighting for.