It certainly isn't the actress's fault, when writers make her character a simple damsel-in-distress, or (as I suspect happened) when directors demand over-acting or over-enunciation. I liked "streetwise" Amanda early on, but the purgatory thing in 1970, in which she whined and wondered who oh who would save her, over and over, was insufferable.
The actor is the person the audience sees, who bears the brunt of it when directors or producers or writers mishandle the character. All the audience knows is, "I don't like her anymore." It's not fair.