Is it such a shame to lose?

I'm really convinced that all the cancers spoil the session, as if to lose was the end of the world. So, i can give you a piece of information: i win and i lose too. And really, as far as i have fun, it's fine. But some, as if it was a shame, run away constantly, and worst, some of them spoil the game of the first, just because he is first. For ps4 players, here is megami.