Some people just can't produce any sort of feedback. I wonder if it's because of their own insecurities or inability to accept feedback (be it constructive or destructive). I am sorry to hear it had such a huge impact on yourself and to be honest I think you did the right thing by sending him an e-mail. Maybe he wouldn't be able to face you when you would talk to him directly and like this he had a chance to think about his behaviour behind the screen where no one can see him.

I hope you play from time to time, at least with your friends :)

Thank you for sharing and have a lovely day!