Roman Reigns 2014

Your Royal rumble rants have got me thinking. During the 2014 Rumble Roman was on the verge of becoming a STAR and more importantly the crowd was behind him, and if not Bryan then they would have been happy with Roman having the top spot. It was for a
time a very Batista like rise. So what happened? Even before his groin injury the crowd was turning on him and Bryan wasn't even around at the time. Why did everyone seem to turn on this guy so fast?

Because he wasn't Daniel Bryan.  The crowd very definitively told WWE what they wanted and we were given something else very different.  And then once it became ingrained into the fanbase that they didn't want Roman, it just became the thing to believe, even if Daniel Bryan was no longer a viable option due to injury.  I don't think it's any more complex than that.