Darts? The pantomime & the hype are a big part of it. Darts has the fun/costumes etc side to it. The heros in darts have always been somewhat anti-heros, superfluous even, given that it's almost impossible to see what's going on, it's not an action sport, and most of the audience are either pissed and/or talking & having the crack throughout. But it does tend to last a while, though there are plenty of one-sided contests.
With boxing, it's now long ago that it became more about the event, though people are still seriously taking a pounding, at times. In MMA they take more of a pounding. But it's a bit hard to understand how a fighter at that level can be out of the fight after a matter of seconds, any top level fighter should be smart enough and sharp enough to at least defend him/herself for a couple of rounds, even when outmatched. And they really shouldn't be all that outmatched, given how much time and effort go into arranging fights.