This happened to me, and is one of the reasons I quit being a manager and went back to being a developer. The product didn't actually fail, but the daily stress of constant interruption and long hours of slogging through thankless shitty tasks eventually wore me down.

Also, I regret not having delegated some of those boring and shitty tasks, since they would have developed skills in my staff (like debugging under difficult environments) that would have made them stronger and more independent developers.