Four times attempted to take over Equestria as an unopposed despot (five if you count the S5 finale alt. future)
Three times count kidnapping/imprisoning one or multiple ponies against their will (four if you count S5 finale alt. future)
Ruled over her own kind using fear and impending starvation as motivators, then disregarded them for dark magic replicas and other alternatives, showing that she never actually cared about the changelings, to begin with
Absolutely relished in deceiving and ruining the lives of Shining Armor and Cadance, and the mayhem that came from laying siege to Canterlot
Tried to rip off Spike’s wings