And that will probably make him hate your guts and he'll never play you again. Unsolicited advice is often unwelcome. I guess that gets you to the goal.Make matches lessons. Coach him. “What are you doing on this shot?” “Where are you expecting the CB to end up?” “Explain to me why you selected this shot.” Etc.
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Unless the guy is missing his rent payments, play him, be polite, and try to beat him 5-0 every time.