Who hasn't, right? If you don't get constructive feedback, you're going to struggle progressing. But in the same vein, getting criticism on your carefully crafted work can automatically be embarrassing, especially if it's a mistake you've done several times.
In my opinion, good code reviews are a catalyst to success amongst closely nit teams, you just have to learn how everyone reacts to feedback and make sure you are helping them, not scaring them or making them feel uncomfortable.
This is obviously not the case in open source because you don't know who you're working with and likely haven't had much interaction with them, but for myself I'd grown a thicker skin by the time I started contributing to open source haha.
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