Myria is jealous of Lady's closeness to Killer and Lady's opening barrage of firepower. Nothing the Goddess possesses can match the terror of a Crimson Raid/Malice Dirge combo, and Lady's Lost Progress is better than Sanctuary. That's where the jealously ends. Myria can pump out damage at high levels for far longer than Lady, and boasts critical advantages in durability and speed. While Lady's initial assault is scary - hell, it's terrifying - it won't kill Myria or even come especially close. Myria can just bring the pain, over and over, in far larger doses than Lady can hope to handle.
You know what's rarer than a dominating female High Godlike? One with a man. Lady's the envy of the ladies of the division, both for her surprisingly happy ending and ending up with a beau of sorts. Myria just wants a friend, sure, but she won't get to say a word to Killer. Crimson Dirge combos far, far outpace even a Goddess's offense, and Lady has a couple of shots of such world destroying power to burn through even Myria's huge store of HP. The path of terror wrought by Myria these past couple of seasons are going to come to an abrupt end at Lady's deadly and capable hands.