Yeah, okay.
I am actually not saying she needs to be found guilty in a court of law. I am saying she needs to be held accountable, and take responsibility. Those people who get off with the poorly-named insanity defense? They rarely get to just go back to whatever crazy sh!t they were doing before; they just don't go to jail. There are still stipulations of therapy, etc.
I mean, really: the episode ended and we're like "Hey, she had unprocessed grief so it's not her fault. Now let her fly off to continue to not address her grief and let's all just hope she doesn't enslave a town again."
My criticism is of the writing of the show that they are making this seem reasonable. Someone with that much power, who is that unstable has a responsibility to curtail it and her grief that causes it to go ker-plooey. You know how we know that? The Incredible Hulk. Huge power capable of disaster based on his emotions. Years of comics of Banner trying to get rid of it and trying to have as much emotional control as possible (a great little scene in the Norton movie). But no, they write Wanda as not accountable, and I think that writing is childish.