I wince at it because it (along with what they did to Hank) were the poorest representations of mental illness. It's mental illness means they are antagonists or evil. And in both cases they never mention an actual mental illness for them (until far later). In Wanda's case they threw out crazy as an insult. But then it ended up being possession. And none of how they depicted it is anything like dealing with mental illness. Because you are never suddenly cured or better. It's a constant struggle. Also removing Wanda from being a fleshed out character to plot device doesn't go a long way in making her good representation. They just did the "womins is baby crazy" trope.
So if movies delve into that, I hope they handle it a hell of a lot better than comics have.