Are you a woman and drawing images of women chained up and starving and abused? No, I wouldn't think think an expression of inner feelings like that would be a red flag.
If it's part of some political statement, where you draw these images repeatedly and publicize them in order to draw attention to starving or repressed women in certain areas around the world, it would also not be red flag IMO as that kind of art would be about making a political statement.
But if you're an adult male, and you draw dark pictures of chained up, starved, tortured, vulnerable women over and over again, then yes I think it's a huge red flag. Why would you be thinking about that so often, and feel the need to express those feelings so often, through the same pictures over and over again? It doesn't mean you have done the same thing this has done, but it means a person drawing those things has the same similar thoughts as this . It's just a life crisis or random opportunity where you think you can "get away with it" to make the jump from fantasy to real life death and murder.