How old of a system? Do you feel it’s the implementation, the design, or the concept itself that went wrong? Is your system a good fit?

(No stake in this one way or another, just curious.)

Less than 5 years. Vanity project. Built and maintained by astronaut architects. Entirely unnecessary. Poorly implemented down to the level of wire contracts being inconsistent. Overheads are insane both from engineering and operational POV.

Resume driven development never goes out of style

I call this one FDD: Fuckwit Driven Development. Because if it was resume-driven I'd expect it to be something that they would want to put on their resume. But this is unmentionable.

There's sayings along the lines of "Victory/success has a thousand fathers, but defeat/failure is an orphan."

Chances are that system, and its outcomes are described very differently on a resume

As long as the list of technologies used is impressive sounding you're on to a winner.

Hail, RDD, my favorite development style.