I'm wondering if the data might be biased. Consider Viper as an example. He's taking the win% on maps where she's played against other controllers (so usually not icebox/breeze bc everyone plays viper on those maps), but usually when she's run on say fracture, it's in a double controller comp. And I feel like teams that run double controller usually have better coordination and utility setups (like Fnatic for example), so it makes sense that they'd win more. It's kind of a reverse corralation. Just because teams that are better with utility coordination run viper + another controller, and teams that are better with utility win more doesn't mean that Viper is a better pick in general (especially for less coordinated teams).