As someone else pointed out, if Davis is open and Josh is not throwing to him, how exactly is that he OC's fault? His job is to scheme players open - which according to you seems to have been done with Davis - not actually throw the ball (that is on Josh).
There are definitely issues with Dorsey's play calling at times. IMO, but blaming him for Josh not throwing to an open* Davis seems a little odd
*Also as pointed out up-thread, Davis was not as open on all of those plays as people are suggesting - at least before Josh got rid of the ball