Science ain’t what it used to be.
I’m not surprised.
I’ve read a few scientific papers in my own field (computer science) and there are a lot of times when I can’t make heads or tails of what they specifically did. It’s not because I lack the skills to understand, but because the papers are couched is so many references, and often obscure the specific algorithms tested (because the researchers wish to monetize their results) that it is nearly impossible to replicate the results because it is impossible to know that the hell they did in the first place.
Remember: if a paper cannot be reproduced, it is not a scientific paper. It’s a press release.