Actually I just realized something. Maybe it's intentional that Carmilla has no charisma, little power of persuasion, and in general little of anything beyond resources and the luck to stumble into a low-risk, high-reward situation with no meaningful opposition.
Carmilla is a capricious maniac who resorts to violence (mainly sucker punches or against defenseless foes) as soon as she doesn't get her way. She kicks Godbrand down a flight of stairs when he ignores and spurns her. She beats the ever-loving shit out of Hector as soon as the opportunity presents itself to reassert her dominance over him (and once he's outnumbered and defenseless). She quite enthusiastically professes her hatred of men, but she has such utter contempt for women that she never even considers that the women on the war council might pose a threat to her plan. (It's like she doesn't even acknowledge that women exist, and her master plan explicitly relied on two men.)
Dracula throws a massive tantrum because his wife was murdered. Carmilla throws countless tantrums because she doesn't immediately get her way.
I kinda love that. I always love a refined and charismatic villain that, deep down, is just a crass, beligerant roughneck. I just wish Carmilla's "mask" was a bit more appealing.
Or the writers just fucked up. I mean, they kinda squandered Godbrand and Hector, so . . . yeah.