'Terribly wrong' is strange framing, but the Dolphins weren't even close to the best possible outcome, and time will prove that even if people like you will probably never admit it.
The potential was there in Brisbane to create an instant success perennial powerhouse, whom forced the standards of the whole league up. Unfortunately the only way that the Dolphins don't end up as a lower to middling side within the next decade, give or take, is if success on the pitch papers over the cracks.
People were celebrating the Titans, Steelers, Giants, etc, etc, as massive successes on their opening weekends as well BTW...