By and large, the UFC almost always comes through on their cards.
Almost always.
For a variety of reasons, though, there have been several undeniably disappointing UFC events over the years, both for fans and for the UFC.
Things can go wrong before, during and after an event, and it is important to think back on some of the unfortunate things that can ruin a card. Though some of these ended up having redeeming factors, all of them are terrible in their own ways.
These events were chosen for a variety of reasons and are in chronological order. So do not get offended if you thought one card was way worse than the one three spots later. It also focuses in on main cards, so even if a card had a strong preliminary card, that does not factor into this list.