To answer the question, yes she can. Worse characters have been.
The real question is should they do it. The Scarlet Witch may be the best villain the MCU has seen. She is powerful and intimidating and can actually be scary. If they redeemed her and made her a hero again it would be a waste and you know they would nerf her powers because having a hero that powerful on Earth is problematic which is why CM is always off in space.
Let The Scarlet Witch be the bad guy. It’s more entertaining.