(His Last Vow spoilers)
Not as bad as people make her out to be (she made bad choices, yes, but she just wanted a future with John, a happy future)
An idiot (she could have just SHOT MAGNUSSEN -> ✅ Blackmail solved ✅ Sherlock isn't hospitalized and like............ There's no way Sherlock and John would have judged her for it, they would've probably helped her cover up the murder even so why, why why why would she shoot Sherlock)