As a software engineer, who hasn't felt like "I definitely know how to make everything better by rewriting the whole thing!"? UI/UX designers feel the same way.

As a software engineer, who hasn't felt like "I definitely know how to make everything better by rewriting the whole thing!"? UI/UX designers feel the same way. It's never the answer, but it's not the end of the world if someone does it; after some time and feedback the product becomes useable again.