You raise some valid and important points and questions. I might not agree with absolutely everything in your huge post, but even in those cases, I think you are asking important questions and we need to do a lot of digging before we can be sure of the right answers.

Everybody that uses the phrase "Sciense says..." is either oversimplifying at a particular moment or simply doesn't really understand how science works. A lot of the problems stem from the fact that the majority of the people simply do not understand the scientific process or the behinds-the-scenes politics of science that you talked about.

Universities (much like high schools) are becoming less relevant as time goes. Many of them are simply profitable businesses happily relying on false advertising while hiking up their prices.

I agree that a lot of the sciences, especially the social ones have "accepted" theories and paradigms that haven't been tested and proven enough. I also have experience helping people close to me out with papers and the like in the field of psychology and I was actually surprised and repulsed by the tiny sample sizes reputable university professors were using to support their hypotheses. Psychology is certainly in a crisis because of all the problems with studying humans you talked about. Additionally, there is very little incentive to repeat other people's experiments so you can validate their results which leads to a huge piece of the puzzle missing. I was thinking of doing a whole post dedicated on this topic and now after reading your post, I think that's what I'll do.