Senna, just like many “huge ego” race car drivers was a complete dick, cutting off Prost to secure the championship was disgusting. Jumping ship just to get into the Renault was a dick move (I’m glad that back fired on him and the car wasn’t what he was expecting it to be and he seriously struggled with it). He was a selfish little spoiled brat with religious fanaticism to boot. Every time I saw him, I felt like throwing up.
Not saying Prost was a saint either. He had his own issues and was way too robotic for me but in the grand scheme, I felt he was less of a dick than Senna (but he was still a dick nonetheless, just not to the point of making me sick to my stomach). I felt Senna and Schumacher both went above and beyond the expected douchiness of an F1 driver. Coulthard and Mansell came across as much nicer individuals. Berger seemed ok as well. Maybe you just have to be a complete dick in order to be a repeat World Champion