Some truths to this. Wilder's main problem is that he's surrounded by complete yes men, Jay Deas isn't a coach, he's a Boxercise coach, and he's never been taught the jab, which is by far the best punch in any striking combat sport. He had the very respectable Mark Breland in but the book always stopped with Jay Deas.
Wilder does have heart however, he got smashed for 3 fights straight and still came forward and scored knockdowns, Joshua would of gotten his mirror out to see his looks have been damaged, that's the difference between the 2.