I don't think so. Look at AJ. Been pushed to the top since day 1. Fans like him. Seth has been pushed for a while now. They haven't turned on him. Dean? Nope. Brock? Nope(and he's a part-timer FFS).
I think the anti-neckbeard brigade likes to cherry pick examples when it fits their narrative. I mean really, all they have for this theory not including Cena, is Roman and Batista. That's it. Two guys who were forced down the fans throats, when there were better options. Two guys who absolutely sucked in the roles they were given.
Creative fucked Roman up, not the fans. If they had just kept him as a dominant ass-kicker(ALA Brock), and not this "against all odds" wise-cracking Cena clone, I guarantee he would still be a big fan favorite.