I have mentioned before that one of the ways to improve while playing games is to treat the game as if you were playing a sport. That usually means playing the game to win, without taking the opponents feelings into consideration. However there could be a problem if you are applying this methodology to all games that you play. When playing against friends, going for the win when they are hoping to have fun and enjoy your company can cause issues with your relationship.
When we play games with our friends it is important to discuss how the game is to be played. Is it going to be a serious game, where each player will temporarily put the friendship aside during the game, and then play a cutthroat game where winning at all costs is the ultimate objective? Or are you going to play casually, taking and joking about other things during the game?
A quick discussion while preparing the game that you are going to play can prevent a lot of tension and anger later. If one player plays serious, while everyone else is expecting a fun laid back game can cause confusion and hurt.
There is another concern, and that is for the player who is trying to treat the game like a professional player, and perhaps they are a professional player who is now playing with a friend. Obviously if this pro were to do their best, then the friends, who we assume are not at their level, will be crushed and probably won’t have any fun. The solution is to play casually, but the pro may be afraid that playing casually will hurt their ability to take the game seriously the next time that they play in a tournament.
My solution is to consider finding a way to play the game seriously while at the same time, handicapping yourself so that your friends have a chance at winning. For example, if a high level Starcraft II player were to play against some friends who were in the bronze league, the high level player could decide to not use any of the units that they normally use, but instead purposefully use units that they know have a disadvantage against the units that their friends are creating. The benefits of this include improving scouting, and also learning how to defeat an opponent when you are at the disadvantage. You end up increasing the odds that your opponent will win the match, or at least come close to winning, while at the same time improving your skills for your next serious match or tournament.