My friend plays video games better than me, how do I get him to relax?

He always brags about it and consistently teases me for not doing something in the game, or not understanding how something works in it. Is there a way I can get him to relax a bit? I mean it's just a game, but this guy thinks he's a know-it-all about all aspects of it... :/

My friend plays video games better than me, how do I get him to relax?
My friend plays video games better than me, how do I get him to relax?
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