I still have the impression that Batgirl was probably at least adequate from a story standpoint; the negative quotes from the studio execs seemed to be specifically about its production values, that it looked like a TV movie (as it was intended to be) and thus wasn't considered visually impressive enough for theatrical release, which is what the studio wanted to prioritize.
Either way, we deserved to find out for ourselves, and the cast and crew deserved to have their work released so they could earn residuals from it.