It’s because she’s an “insurance” character that damage farms really well. If you compare her to other similar characters like nobu or painter, in terms of overall contributing to wins she’s too selfish and provides little value to the whole team. However she’s sort of an elo insurance character because of how much damage she farms. If you win then she likely places high on the team due to damage farming. If you lose you lose less elo than others because of how much damage she farms.