Ask HN: How do you not take criticism of your work personally? 3 years ago
'taking it personally' would mean it affects your own self-perception or sense of worth.
The simplest remedy is discovering your self-worth notwithstanding the comment. Remember your intrinsic value and the accumulated value you've already brought to bear.
Your ability to bring all criticism back into this context lets you treat it from a more detached (clinical) position. Judge the merit of the opinion, plan out any potential improvement or remedy, and frame your response accordingly...