Are there other ways to hurt a guy's ego besides replacing him with a boyfriend?

It's not fair that replacing a guy seems to be the only agreed upon way to kick a guy where it hurts the most (ego). What if you can't find a guy to replace him with? Aren't there other ways to make him realize a girl's value and regret taking his time in asking her out, and get even with him for taking her for granted?

Are there other ways to hurt a guy's ego besides replacing him with a boyfriend?
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