Charlotte beating Asuka for the SD women’s title right before WrestleMania. I was heated that night, so much that it ruined the show for me up until the main event with Kofi's stuff. It was a blatant tactic to make the WrestleMania match feel more important and justify Charlotte's place in it. It was also a huge slap in the face to Asuka, who went from having a potential title match (it was going to be her, Mandy Rose, and somebody else in a triple threat) to not even being on the card. I'll always remember this as being one of the things that made me tune out of the product for a couple years.
Brock/Roman at WrestleMania 34. It was everything I was afraid their first match would be. They set it up for months because both Brock and Roman were winning their matches with only one finisher. They could have told a really good story in the rematch, having both guys try to hit their finishers multiple times and it's constant counters. Then maybe Roman hits the spear and Brock kicks out. Brock then hits the F-5 and Roman kicks out. Brock is pissed, hits Roman with the F-5 off the top rope or something crazy and he wins. Instead, it's just ten million finishers and no actual wrestling. Also, Brock won, which made absolutely no sense and made Roman look like an idiot.
Becky beating Bianca in thirty seconds at SummerSlam. I was shocked when I found out and it could have easily killed Bianca's momentum for good. I'm glad it didn't end there and Bianca went over at 38.
*Saving this spot in case Naomi drops the belt at SummerSlam. That will be one of the dumbest booking decisions in the Triple H era.