In the sermon on the mount Jesus talked about resolving disputes by “taking it to the church” (literally “assembly” of believers) so there was some concept of church during his ministry. Church means “assembly” (of people) though, the greek word really bears no resemblance to the modern idea of church as a building with a carpark.
I feel that’s probably among the genuine sayings of Jesus because later editors have declined to inject verses supporting bishops and elders which was surely tempting to do.
I like your analogy. I am not a Christian, but I believe the majority of Christian writers had honest intentions and were working with the way the world seemed to be to them at the time.
Eg Paul telling women to be silent in the church assembly is harsh but makes a little more sense given he’s created this mixed male/female religious meeting that didn’t exist before. It’s similar to telling all the new people to be quiet and sit still because they’re new to this. His reasoning is that “Eve” is weak. But the very fact he’s admitting all the women to his meetings in the first place shows he thought Christian belief was bringing men and women into a more equal space when previously there had been an even deeper division. And so on.