I think you should attach your self-worth to your design; but not to some minor mistakes in implementation. Not your entire self-worth, just that of it which has to do with being a designer.
A great novelist would be foolish to let some editor's remarks about spelling errors and run-on commas destroy their self-worth as a writer.
If a knowledgeable critic points out problems like the plot being a series of unoriginal tropes, and the characters being paper-thin stereotypes, that has to strike at the author's self-worth as a writer. I don't see how you can get around that.
A great novelist would be foolish to let some editor's remarks about spelling errors and run-on commas destroy their self-worth as a writer.
If a knowledgeable critic points out problems like the plot being a series of unoriginal tropes, and the characters being paper-thin stereotypes, that has to strike at the author's self-worth as a writer. I don't see how you can get around that.