[cnity]

I nearly 100% agree with you accept on one point. "You are not your lines of code." is putting your head in the sand, but there's a way you can frame PR feedback (and other feedback) which re-associates your identity with your output (because disassociating is a terrible idea) but brings joy back: these people are coaching you and giving you a gift. Your skill level is absolutely included in criticism, but only such that you may grow.

This only works if you truly believe that you are accepted by your team at all stages of your development, and if the feedback is delivered with the intention of helping you grow.