The term "dark-minded" can evoke negative associations, implying a tendency towards malevolence or ill intentions. Alternatives include "cynical," which suggests a mistrust of human nature and motivation; "pessimistic," which connotes a gloomy outlook on life; or "morose," which signals a general sadness or sullenness. "Misanthropic" denotes a deep-rooted dislike or distrust of humanity as a whole, while "malevolent" indicates a more active desire to cause harm. Other potentially useful synonyms might include "brooding," "sinister," or "maleficent," all of which capture different aspects of a dark or negative mindset. Ultimately, the choice of synonym will depend on the context of the sentence and the specific connotations that a writer wishes to convey.