Immortus was one that was manipulating her also but Mags did use her fragile state to get her at his side. Everyone wanted the Wonder Man thing to end. It was too freaking weird. I don't know what's going on in Byrne's head, but yikes! Immortus manipulated her entire life to lead down that path. Which is also dumb because it removes all her agency in comics up to that point. If I had my way Darker than Scarlet and AD/HoM would disappear.