#3. Hurting and healing
Mistakes happen.
Unfortunately for WWE, they made their biggest mistake during the Universal Championship match at Hell in a Cell, where the contest was ended by referee stoppage. The reason for this is that Seth Rollins hit The Fiend with a sledge hammer while he was already trapped under quite a few other foreign objects.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
The problem with this is that it was a Hell in a Cell match and brutality was supposed to be a selling point of this stipulation. With that stated, WWE's official explanation of the ending didn't make sense and it took away what many thought should have been a crowning moment for The Fiend character.
Of course one could argue that this was too soon and that WWE was only furthering the storyline by doing this, but it happened in such a way that it just didn't make sense. WWE did manage to make up for some of it after the match by having The Fiend rise up Undertaker style and choke Rollins out, but there was still a lot of damage control to be done.
Interestingly enough, WWE changed all that a month later by having The Fiend defeat Seth Rollins at Crown Jewel for the Universal Title, which fans went absolutely wild for. What made the moment even bigger, however, was that Wyatt survived a pyrotechnic explosion, several curb stomps, and anything else Rollins could throw at him.
This moment firmly drove home the fact that The Fiend was going to be the company's next big thing and that fans should buckle up for the upcoming ride.