3 Explanations for the Universal Championship match being short and unclean

#2 To cut some time for the rest of the event

WrestleMania 35 had a stacked card with sixteen bouts.

WrestleMania 35 had a total of sixteen scheduled matches. To accommodate this humongous amount of matches, WWE had to keep some encounters short. Thus WWE decided to cut some time from the Universal Championship clash between Seth Rollins and Brock Lesnar.

WWE has been employing this tactic for a lot of time. We do not need to look far behind to see that. At 2018 SummerSlam, WWE had a massive total of thirteen fights - split between RAW, SmackDown Live, and 205 Live. Since SmackDown and 205 Live was likely to have better matches, WWE cut the time for the bouts from RAW - including the main event. Ronda Rousey squashed Alexa Bliss. Demon Balor squashed Constable Corbin. Braun Strowman destroyed Kevin Owens, and Roman Reigns had a short match against Brock Lesnar.