You think WWE aren't putting over your darling.Heck, look at how TNA treated A.J. Styles.
They had an angle where he "accidentally" married Karen Angle. They had a story where he couldn't get a title shot for a year, and everything went wrong for him. And then, there was the "Claire Lynch" storyline.
When Hogan, Bischoff and others came to TNA, Styles (as a TNA original) was made to look foolish time and again.
You should be thankful that, after all that, Vince still decided to sign A.J., and that he still is cheered by fans, such was the burial in his later years in TNA.
He has a cool new look, (I like the long hair, beard and gloves) and got a WWE Title shot and main event five months after debuting. He didn't even start in NXT. Vince had such confidence in him, that he started straight on the main roster (how many others, other than Sting, have done that in the last three years)?
If anything, A.J. Styles has had his reputation salvaged and enhanced. He will probably be in the MITB match, and might even win it (I still tip Kevin Owens as Mr MITB, as I think they can get a bit of mileage out of it), but Styles is being groomed for big things, rather than being buried.