Maybe read my original post again? I specifically stated Cooper seems to play at his worst when everything around him isn't clicking. What was his best season? 2016 when the Raiders had Carr playing, at the time, when Carr was being discussed as an MVP candidate and the Raiders secured a playoff spot. In 2015 and 2017 when the Raiders sucked, that's when Cooper seemed to lose focus and his hands went to crap again. This really isn't bringing up the fact that even in his good seasons, he becomes a ghost with random flashes here and there. His big Philly game last year was not the first in his career, he did it with the Raiders too - this big 200 yard game just to go back to 2-3 catches for 20-30 yards.
I talked to Raiders fans about Cooper, those were their two biggest criticisms and there is this odd view of him here that this dude is just some relentless worker - that's not at all what Raiders fans said, they said he actually looks like he doesn't give a crap at times and that's when his play dips. If this season starts going south, I expect Cooper to lose focus again. Viewing him as a #1 receiver is a mistake.