Anakin has a clear motive, and a logical progression from naive to evil.
Danny just decides to lose her shit one day.
2 points
It only feels grounded because you get her pov and the other side is obviously bad (according to her), so they totally deserved it. She showed up to several cities, murdered the fuck out of them, took what she wanted and left. Yes the turn to full on evil was handled poorly, but all the signs were there before hand. Tyrionβs speech after the fact said as much.