Lets be honest lads WWE never fully recovered from the end of the attitude Era.
They had a good run from about 2000-2005 with the likes of Team Angle vs Lesnar, Big Show & A Train, Benoit, Guerrero etc. But once the PG era came in and Cena was the main man with garbage like a GM talking through a Laptop it all became a bit silly and has been a mess ever since.
Stone Cold was spot on when he said whilst WCW failing was great for WWE it also wasnt as they had no competition to push them/the product on.