This show is such that justifying actions is a foregone conclusion. Mrityunjay wiped out half of Manvi's family because she was a threat to his white-collar persona and those she turned to for help screwed her over even further. And these scheme of things, the only fault of Manvi was that she fell in love with the wrong man. But if you see your family being killed off one by one, which person can stay sane and not go bloodthirsty in revenge?
Coming to Maya, Rishi for one was not a seedha saadha ladka like Manvi was. He himself was a player, who displayed traits of his father in his actions - be it fake wrist slitting, be it "kutta nahi hoon main tera", be it him trying to kiss her when she is sick because he believed that "She is my girl so I will touch her". Whereas with Rudra, it is, "I will not touch my girl, because she is not comfortable." The authority of being the partner is there - but one took it as ownership, and the other as a partnership. Rudra survived because of his selflessness, because of the purity of what he felt for Maya. He revived that Manvi in Maya who was on the brink of dying along with him.
Rishi's death cannot be justified just like the deaths of Manas, Myra, Manvi's Dad and Manvi herself cannot be justified. So let's remove the justifications now. This is a war, and war does not have justifications - it only has sacrifices and ultimate victory. And I want to see the end of Mrityunjay, that's it.