Formula 1

[dodge]

Hamilton certainly didn't like Rosberg beating him - he was a threat.  It doesn't appear to work well when both drivers are close in ability with the same car - particularly if the car is good enough to challenge for the title.  That Bottas is no threat means that Hamilton and Mercedes can just go about their business without internal politics taking over too much, but still know that they both cars will finish in the top four just about every race.