MAXWELL MALTZ

• You feel unworthy because you don't think you're doing enough to improve yourself. Self-improvement should help you to recognise your strengths and work on your weaknesses.
• Unrealistic expectations.
• Unproven claims. There ...

When you play tennis, you're really competing with yourself. You're perpetually trying to improve: to hit shots faster, improve placement, surprise your opponent, make your footwork more efficient than it was the last point. 

If you try to blame others, like the coach, the opponent, the ...

This technique's strength is that it frames the course of the debate and can create a false appearance of credibility and control.

• Because it gives an advantage to the Gish galloper, your best course of action is to avoid playing their game.