I love this game.
Addiction to speed is a part of it. I think being trapped in a car actually creates a lot of psychological issues. Another one that doesn't get mentioned enough IMO is claustrophobia. All these psychological issues are probably big contributors to road rage.
I haven't been following dota2 much lately, but this game3 between liquid and falcons makes dota feel like it did 5 years ago. Love seeing how liquid adapted their draft (I don't think void is meta anymore) and the fights are off the hook!