My personal take is that "built incorrectly" should almost never be tolerated. The customer doesn't need to know how it was built, merely how long it will take.

My personal take is that "built incorrectly" should almost never be tolerated. The customer doesn't need to know how it was built, merely how long it will take. But if by "built incorrectly" you mean an unwise business decision (logging in with a phone number for instance) then yeesh, I wish I had an answer. Putting your foot down sometimes means leaving a job.