Wanda tried to write a wrong by altering reality. That was a plot point in Dissasembled and HoM. Her power made it easy to lose track of reality and her altered reality due to the nature of her powers back then. If she didn't like something she changed it. And the resulting personality affect of having a power close to reality warping is that you are able to shaft any responsibility or ownership of your sins. Much like how Hellions is explaining Empaths personality defect
HoM was due to spite.
This was due to being an idiot and not learning her lesson
There isn't a quick fix for your sins. And that comes back to the very nature of her powers and what they evolved into