#2 Worst: Pinning the WWE Champion
The WWE Championship matches at most pay-per-view events are the third/fourth from the top. This is because of how AJ Styles has been booked thus far. If you compare how bulletproof Lesnar and Reigns seemed, Styles has seemed like a chump and not a champ.
I do not understand why two men competing for a title needed to team up before the big match in any case. Anyway, they competed to take The Usos on and because all of the four men are pretty good workers, actually worked a pretty decent match. As one would have expected, there was a miscue resulting in The Usos picking up a win.
I do not think under any circumstances you should pin a Champion on TV unless it's by a top/dominant performer. This match certainly did Styles no favors at all.