While the original poster of this message is most likely just trying to get a reaction, I am going to respond to the question in the title and not address the unverified claims made by the poster.
Can SARMs shut you down?
Yes. Unfortunately, idiots are out preaching about the safety of SARMs and companies are doing the same thing. The Bro science on these compounds keep making posts about the safety of SARMs and kids are seeing these posts. They don't do their research and realize no human trials have actually been performed using almost all SARMs if any!
I know it is just anecdotal evidence and one person stating their experience, but even in my 40's I wish I would have never touched SARMs. I used RAD140 and LDG and yes my natural production was driven down under 300 ng/dl and that was 6 months after going off. Now I am on TRT and will be for the rest of my life.