This post just reeks of complete ignorance of the character. Seriously. I'm not being an ass here, or anything.
Wanda's life is so much more than your insinuations here. She's starred in hundreds of stories, of which...five...were about her being manipulated? She's running on par with most other heroes, and lagging behind your average X-man.
It's fine that you have no idea of who she is (and thus, by extension, little grasp of Avengers history at all...given that she's a central part of most of it). No one expects that everyone know and/or love every character. It's not even a remotely possible pursuit, to be honest.
What would be nice though, for a change, is for X-fans to stop spouting this sort of misinformation by wrote. Constantly. It's incorrect. Wanda is not, nor has she ever been, a 'villain'. It's just not the case.
She didn't 'miss her one opportunity to become an amazing character'. She's been an amazing character for decades.