No it's bad writing because it's bad writing. And when they take the character into a "different direction" that nowhere near as interesting as it is in the source material (and have to make her the exact opposite of what she was there), the it definitely is "butchering" to me, simple as that.
And I'm NOT some purist who cannot stomach changes. I have no problem with changing being made to the source material (it is an adaptation after all) if they're interesting, make sense, and they can sell me on those changes. And the show has made other changes in the past that I've been ok with.
The problem here however, is that NONE of this is the case.