It's not at all boring, because the Darklords who want power or control or knowledge are also engaged in activities that the PCs can also engage in. The PCs can try to stop the DL, can try to help the DL, can try to gain the power/control/knowledge first, can try to negotiate with the DL about it, and more.
The Darklords who want to ruin other people's relationships because they can't have one themselves are the boring ones, because that's all background stuff. It's not something that can be used as a plot, unless you want to screw over any PCs that are in a relationship.
Wow, did you deliberately misread everything I've ever written or what?
Give the female villains something other than only a desire for a man or baby. If Ivana, Jacqueline, and Gabrielle still desperately want a man, fine. But they can also be actively engaging in other pursuits at the same time.
Are you seriously against the idea of these women having something to do with their lives other than pine?
Women with non-domestic goals does not equal non-Gothic horror. Especially since the romance associated with Gothic Horror doesn't even actually mean love; it comes from novel, meaning "book written in a romance (Latin-derived) language." A book for the masses to read (i.e., not a scholarly or religious text), and as a genre, Gothic literature influenced even pulp novels and comics in the 20th century. It's a very broad category of fiction.
Gothic Horror is about the dark, primal emotions, the morbid aesthetics, and the people involved having unwanted destinies and karmic fates. You can get that with a female darklord with a non-romantic background!
And none of that prevents you from running plots that don't involve the Darklords, which for me at least is something like 99% of all of my RL adventures.