WrestleMania is supposed to be WWE's show of shows and the be-all and end-all of the wrestling year. Of course, as fans have seen time and time again, that isn't true. More often than not, the spring spectacle is tainted by bad decision-making, a reliance on past stars, and politics.
Usually, the company is to blame. After all, it was Vince McMahon who decided to have Roman Reigns head into WrestleMania as the babyface challenger two years in a row, and Vince McMahon who decided last year's show should run more than six hours. Those examples just cover the last few years, so there a dozens and dozens from the prior three decades.
Sometimes, though, it's the wrestlers themselves who end up screwing up the show, either in the spur of the moment or due to exercising influence beforehand. It's no secret that most of the wrestlers in high-level positions at WrestleMania have quite a bit of backstage stroke, and they can either pull strings or get away with behavior that severely hurts the company. There was no punishment in these cases, just fans who were undoubtedly turned off of WWE's product and would-be stars who were sabotaged.