1. Everything Related to Roman Reigns' Push
Fans knew that The Shield was going to break soon, as all three wrestlers deserved a singles push. After the dissolution in June 2014, Roman Reigns was quickly inserted into world title contention that month.
Everyone thought that either Seth Rollins or Dean Ambrose would get to taste the success first because they were over with the fans then. They deserved it even more than Roman, but WWE still went with him.
Today, he has had headlined 4 Wrestlemanias, won the 2015 Royal Rumble, is a three time WWE World Heavyweight Championship, and is the current Universal Champion.
Fans hate him for this reason itself that he is pushed continuously over other deserving superstars. The management has sacrificed a number of wrestlers to get Roman over. with the latest victim being Braun Strowman.
Wherever he goes to wrestle, fans boo him out of the arena. But, despite this, Vince has still stood by his initial decision by making Roman his guy and the face of the company.