I think being a big user of whatever you're building is incredibly useful for finding these kinds of issues. If you're a big user as well as a dev then you will often stumble on these little things before a user does, and you are also perfectly placed to fix these issues before users can stumble on them.

I suspect this is why small teams with strong ownership can be so effective. If you feel ownership of a thing then you feel users' pain when they hit these little paper cuts, and it becomes a point of personal pride to fix these things and make the UX as smooth as possible.