I mean, Balor is an easy target, but he's still pretty fucking over and his SummerSlam match with Wyatt is something they should have been building to from the start. Hell, the dude is probably more awkward on promos than Roman Reigns, he just gets away with it because he has babyface charisma that Roman doesn't (not that this is the performer's fault, it's that people don't want to see Sasuke Uchiha in the wrestling ring). I think Black has the same thing, except he probably can't be worse on the mic than Balor is. And I like Balor, it doesn't really matter that he's an awkward dude on the mic.
I think you'd have to legitimately go out of your way to ruin Black. A lot of the people that wrestling fans think have been "ruined" haven't really, it's that they play weirdo gimmicks (superfan who hugs people; awkward ska-guy) that don't work well to be "booked well" which wrestling fans tend to interpret as "wins all of the time."