Durp, durpity durp ... I did not "completely ignore" anything, nor did I blame everything on the play "calls" (I will assume you actually mean play design).
What are the "details" Warner refers to? A fact that can't be overemphasized: details mean EVERYTHING at the pro level. Here they mean the finer points of timing and complementary route spacing (play design elements), receiver sight adjustments, QB pre- and post-snap reads and fundamentals problems involving BOTH the receivers and quarterback. This is a perfect storm of suckage caused by poor coaching and fixable by GOOD coaching. It's a matter of COORDINATION for which the OC primarily is responsible.
ANY quarterback acclimating to a new system (especially a young one still learning the NFL), dealing with a nagging injury and forced to continually navigate shaky OL play is bound to lapse into bad habits extending to mechanics/fundamentals. Who fixes that? THE QUARTERBACKS COACH. And instead of a QB coach with experience we get renowned QB destroyer Joe "I Dunno" Judge. Hence, Mac's public cry for help. On top of it there is no dedicated OL coach, period. This is mind boggling.
It's well established you hate Mac and want Bailey Zappe to be the starting quarterback. But analyses like these point to generally systemic problems with the offense a quarterback switch won't address for long, if at all. Yeah, the quarterback can make poor pre-snap reads but making the correct reads also go for naught when receivers aren't on the same page. Has Mac struggled and regressed this season? Absolutely. Only idiots won't examine why and hold him primarily responsible -- especially after he performed at a superior level his rookie season. The most important question to ask is what has changed from then 'til now.