It's amazing. When HOU fired their OC, the majority of Bills fans I saw/heard/read understood that he was the fall guy for BO's failures. Yet when have an offense that can't function, run by QB's with no prior success, who never go on to be successful elsewhere, fans insist on blaming our OC and "playcalling."
All-22 analysis really slammed the door shut on that nonsense, for the most part. Ashame it wasn't more prevalent with Hackett was here, otherwise fans would have seen precisely what you mention above (which was painfully obvious).