So the name Carmilla seems to be loaded. Or the character, but you associate the name with ... well you know what I mean. That being said, I am copletely free of that baggage, so I can't really relate if that is problematic for some. I can say that I liked the movie and the drama it build.
The oppressed, the not being able to express ones feeling(s). And the horror elements of it. Even if there were a few too many dream/nightmare sequences in it for my taste. But that is me - you may feel differently.
Good acting, good cinematography and overall very well made. The "old" setting, the sexual and occasional explicit violence is something you have to be able to dig ... go with the flow sort of. If you can the movie is quite rewarding.