QB Accuracy Problems

I'm not sure if this classifies as a defect per se, but I continually have a problem, too often occurring, where my quaterbacks, even highly rated ones, have really, really poor completion percentages in games. If you look at a top flight QB in the NFL, say a Drew Brees, you're going to have to look hard to find even one instance, much less multiple ones, where he was 11/26 at any point in any game. Yet, right now as I play the championship for my league, that is where the highest rated QB (as far as his attribute numbers) in the league sits. And I see this all the time, in fact I would say most games, at least 7/10, at one point well into games, for most of my highly rated qbs, their completion percentage will dip below 50%. It is very hard for an offense to have a lot of consistency when their passing games are frequently dipping below 50% in the middle of the third quarter.
So thats the overall theme - my offenses, even on teams who I envisioned and designed to have top flight passing attacks, are lacking a lot of consistency bc they are not achieving consistency in the passing games, and are able to rely on being 11/26 more often than being say 20/26 at some point in most games. This leads to a current state when the top offense are scoring 23-26 points per game instead of 27-30 where I would prefer to see them.
I have tried global edits to jack up the overall league accuracy of quarterbacks, yet continue to see this. Are others experiencing something like this? Like I said I've tried a lot of things, it's starting to feel like it's more of an overall game issue than just how my league is setup, but i'm willing to believe im wrong...
So thats the overall theme - my offenses, even on teams who I envisioned and designed to have top flight passing attacks, are lacking a lot of consistency bc they are not achieving consistency in the passing games, and are able to rely on being 11/26 more often than being say 20/26 at some point in most games. This leads to a current state when the top offense are scoring 23-26 points per game instead of 27-30 where I would prefer to see them.
I have tried global edits to jack up the overall league accuracy of quarterbacks, yet continue to see this. Are others experiencing something like this? Like I said I've tried a lot of things, it's starting to feel like it's more of an overall game issue than just how my league is setup, but i'm willing to believe im wrong...