Whoa up, there, Podnahs. You seem to be forgetting that almost everyone in the series "broke bad", not just Walt. No matter how you felt about any of them, even the DEA agents were not 100% pure. Even many of the children are bad, working for the dopers, shooting people, and don't forget to remember Flynn's high-handed moralistic judgment of his father... In her defense, Skylar is no exception and not even the worst of the bunch.
No, the most despicable woman in the series is not Skylar, and not even the heinous Lydia, but that nasty, lying, thieving piece of work, Marie. Either her or Jesse's mom. Even Ain't No Skank was less of a skank than these last two.
Here, for everyone's enjoyment, that delicious "I Hain't No Skank" skank:
https://www.youtube.com/watch?v=9KGggdwNjuU