You were always more than your output
We tend to wrap our sense of self around what we produce. The work becomes a stand-in for the person, and feedback on one starts to feel like a verdict on the other.
When our identity lives in our output, we defend work that should be deleted and resist necessary changes. We hold onto approaches longer than they deserve because changing course feels like an admission of personal failure. We even interpret a mistake not as a genuine error, but as a personal defect. That can result in burnout.
But it's worth noting that most of what you make at work was never yours to begin with. The code lives in your employer's repository, the designs ship under their brand, the writing goes out with their name on it. Attaching your identity to something you don't own, which will inevitably be changed by someone who joins after you leave, is a losing position from the start.
The artifact belongs to whoever paid for it. But the thinking behind the work is always yours: the judgment, the taste, the way you framed the problem. Those capabilities remain yours forever.
Separating who you are from what you make is hard. I've made the mistake of blurring those lines more times than I'd like to admit. I still care about my job, but I'm actively trying to keep my identity out of it.
My approach is to redirect that energy toward my own creations: side projects I build just because I want them to exist. Free from external judgment, they're snapshots of how I think right now. When I tear one down and rebuild it, I'm not conceding the old version was a failure, but I'm watching my taste and judgment evolve.