Although I feel your frustration, I cannot agree with your assessment. Mostly due to the casual interchanging of doctrine, culture, and programs, which are not the same thing, but you knew this already.

I’m any case, a good place to start with the problems I find in your assessment begin with the idea presented here. Enjoy! https://www.thatonemissionary.com/post/does-new-church-doctrine-contradict-old-church-doctrine-how-math-helps-us-understand