From what I heard: Skimming over science, best practices, risks of contamination, risk of producing horror chemicals, problems of sourcing materials, storing materials, storing the final product etc etc.
Here is a bsky thread from the last time they were in the publics eye (more here if you dont have an account) (the latter articles are clearly working on a diff definition of capitalism than I use so I chose not to be too annoyed with the weird digs about that).
This should be a very big red flag: "Mixæl Swan Laufer worked in mathematics and high energy physics until he decided to use his background in science to tackle problems of global health and human rights." (Ignoring all the other smaller red flags btw, I think I could point one out ever paragraph, if I had not heard about these people before, the final red pill reference would have made me think they were trolling).
It is a bit weird, it has very high EA vibes to me, started and did some good (epipen in 2017 vs EAs malaria nets), but end up to have some crazy plan for which the other things are more of a smokescreen for their real plans (an easy bake chemical oven make chems at home kit vs EAs stopping our lord and saviour the robotgod) using rethoric aimed at a specific subgroup (2000-2010 anarchist libertarian hackers vs nerdy altruists)
E: I really wonder if they were influenced by the dr sleepless series from the disgraced warren ellis, and the stuff around that.