watching ML season 1: Chat Noir gets mind controlled so often it walks the line between repetitive and memetic. This is either lazy writing or a ploy to keep the show's focus on girl power.... Either way another whimsical entry in the unintentional children's show fridge horror category.
watching ML season 5: Oh, The Catboy Is Mind Control Themed.
At this point you could say that Adrien caused both his parents' deaths, but really they both used him as an instrument upon which to kill themselves, like an inanimate object. No agency on his part whatsoever. The family knife.