Shake your opponent’s hand like you mean it. Without them, your win would mean nothing.

The other side is not an obstacle to the game, they are the reason it is a game. A win against nobody is just an activity, and the harder they pushed, the more your result says. Treating them as an enemy makes the whole thing smaller, your own performance included. Most people work this out years later, usually about someone they used to hate playing.

After the next match or debate, say one true specific thing to whoever you were up against. Name the part they did well. It costs you nothing and it changes how the sport feels for both of you.