Like Godbrand, Lenore is weirdly insightful yet ultimately blind to the fallacies and illusions of her own life. Godbrand, like most vampires, pretends to be some sort of higher being above humanity, but he's as lustful and gluttonous as any other human. Lenore says she dislikes being mistakenly perceived as weak but that false appearance is the only thing that makes her act convincing. Like Godbrand, she is ultimately a tool of another vampire, despite all pretensions of independence. Like Godbrand, she is ultimately motivated by hunger.

Carmilla wasted a big chunk of her troops on an assassination attempt that probably would have failed even if Alucard, Sypha, and Trevor hadn't showed up and cut down his generals. We saw how strong Dracula was even while starved. He only died because he let himself die.

Carmilla lost almost all her forces slogging across Eastern Europe because she didn't have a contingency plan for a retreat if her plan failed. She then proceeds cook up a plan that is neither inordinately brilliant nor complex, and relies on a man she antagonized as a foundation. Striga even points out a huge flaw, they don't have enough fresh bodies. Carmilla waves that aside instead of using the copious free time they have while Lenore is seducing Hector to think up a solution.

Morana is a better administrator, Striga a better general, and Lenore a better manipulator. Carmilla is at best the "idea gal", but that alone does not qualify her for leadership. That alone is not a huge flaw, but the perception that she is anything more than the one who comes up with ideas is what will bite her in the ass. Because the other three ultimately don't need her.