Not at all. You know what they say: the ride down can be even more exhilarating than the climb to the top. In fact, the higher you climb, the more spectacular your fall will be. Shogun reached LHW zenith during the 2005 Pride GP, I enjoyed the fuck out of watching him as the unstoppable stomping machine, and that's exactly why I have also enjoyed the fuck out of watching him get KTFO by Lionheart.
Thrills and agony are two inseparable sides of the same coin. The greatest thrills are often followed by the greatest agonies, just look at Ronda's rise and fall. A true fan embraces them both.