He never said that. He said he'd lose and then Taker would be gone. He said that they never put anyone on the main roster over. He said that they weren't building new stars because of that.
And he is right, they bring back all these old "draws" to pop ratings and the main roster looks like small potatoes. Nobody is elevated, nobody wins in the end.
Sure, you make Undertaker look like a big deal, you make Rock look like a big deal, you make Brock look like a big deal. And now Brock has the title, and the past three months of TV have been absolutely dogshit, because Brock wasn't there and anyone not-named-Cena that was there means jackshit because they're a bunch of small fry losers. Which is how they are booked.
And then Vince McMahon has to come out in front of a dead crowd and run them down for not giving a shit about anything.