Lol, he's not wrong. Wilder hired a yes man, Malik Scott to be his trainer, a guy who laid down against him in the ring, you think Malik Scott is telling Wilder the truth or just blowing smoke up his ass and stroking his ego? Wilder doesn't want opposing ideas or views which is why Scott was hired, everything he has said and done since the loss to Fury suggests he's in a world of his own. All the sycophants around him have just reinforced his hard headed delusions.
A lot of the American fighters like the Charlos, Dirrell and Anderson are speaking negatively about Wilder lately. I think they realize he'll be finished after Fury mops him up again so they no longer need to pretend to support him.