The Bears have never had this type of Offensive coaching staff to develop QBs. Even if you don't count Nagy it is one of the better staffs in the league. After Foles is traded they should be able to bring in a young QB to develop into the backup for 2022.
Offensive coordinator - Bill Lazor
Pass game coordinator/quarterbacks – John DeFilippo
Offensive analyst/special projects – Tom Herman
Exactly who have they developed in any position on offense??? There are good players who sort of stayed good, bad players who stayed bad and OK players who got bad. I can't think of one player they have turned into a great one no matter how high the hopes were for them.
So you want to blame Trubisky who just stomped our ass without this staff behind him, OK and what about Foles? I never thought Foles had anything anyway, but what about Dalton? They can't even get the most out of vets who don't need to learn.
And the way you said "Even if you don't count Nagy" says you think Nagy is a great one!
Blind fanboy crap will get you nowhere.