The Lackluster feud with Bray Wyatt in 2014
When The Shield and The Wyatt Family locked horns in 2014, the chaotic matches and exhilarating segments made it a memorable run for both teams. However, Ambrose's rivalry with Wyatt family leader Bray didn't recapture the same magic. Both were great mic workers with distinct personalities, but the feud did not click and the matches were weak. The situation might have been different in another era of WWE, where creative limitations were not so stringent.
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The One-sided rivalry against Seth Rollins
After Rollins broke up the Shield, Ambrose began feuding with him. It was the latter's first chance to make a big impression as a bona fide singles competitor. He was receiving consistently warm reactions from the crowds. But Ambrose never won any meaningful matches, instead developing his humorous persona in the middle of a revenge-driven narrative.
The feud with Rollins deserved to culminate in a WrestleMania match, with Ambrose ideally going over. This would have solidified both as legitimate main-event level talents, and as the flag-bearers of the next generation of singles stars in the company. Instead, WWE pushed Roman Reigns to the moon, who was initially booked poorly, and continues to face the lasting effects of that phase to this day.