I think the best example of this is Once Upon a Time. When Regina was evil, she was conniving and well planned. Rumplestilskin made plans that would have worked if it were for an *unforeseeable* factor. But all the heroes on the show often make poor or highly-inconvenient decisions. So now Regina has become good, she makes poor decisions as well. I feel like the writers are trying to do this to create conflict, but it only makes the show incredibly tacky.
There's so much stupid on this site, why not list them all? I upload once every week, that means 7 days.