It's not okay to brag to others.
Don is a basketball player, and he's talking to a player on a team he just beat.
Don wants to say something to the player.
Don tells the player that it was really hard to beat them.
Don tells the player that his team was so much better than his.
The player feels proud, and they know that Don is just being nice.
The player's feelings are hurt, and he feels that Don is a jerk.