If not running the right route is 112 catches vs Parker (assume he always ran the right route) pathetic play then I’ll take the former. Bill Parcells tells a great story of coaching LT in his rookie year. Taylor consistently would blitz in a game out of a formation that wasn’t taught. Parcells yelled at him that what he was doing “wasn’t in the playbook”. Next defensive series Taylor does it again and sacks the Cards QB and George Martin picks up the fumble and runs for 6. Taylor says to Parcells “maybe we should put that in the playbook coach”. Just saying.How would you define "hold someone accountable"? Just because you don't like the new coach you cannot say that the previous one wasn't held accountable.
You have probably read Chambers insight on this in VIP so I would say it's not speculation. Also, getting open doesn't mean he knows the playbook. He ran the wrong route on several occassions and that is the definition of NOT knowing the playbook.