Let me give you a really good piece of spiritual advice: Don't harsh other people's yum.

Secondly, Buddhism isn't a corporate ladder with annual promotions, it's a set of understandings. 10 years or 10 hours, it's not the time that matters, it's the understanding. Maybe examine why you're really putting down this guy's effort? Is it really about him, or is it about how you feel about yourself?

Also: don't allow yourself to be goaded by this comment, or by this situation, everyone's intentions here are positive. If they are wrong, let them be wrong. With that in mind, my final word: Give yourself the validation you need, or give up on the need entirely.