GrapheneOS is a highly problematic ROM with a lot of security grift. Their community is extremely toxic, racist, disgusting and refuse technical help via a combination of lots of gatekeeping and technical elitism. https://www.youtube.com/watch?v=Dx7CZ-2Bajg
The developer is a one man show who acts like a dictator and exclusively claims Google Pixels are the only phones he will ever support. Why? https://unddit.com/r/privacytoolsIO/comments/gs4uv7/i_dont_fully_trust_grapheneos/fs82fdv/
GrapheneOS also takes some rather controversial stances regarding the protection of its users, a lot of whom have a high threat model. https://teddit.net/r/privacytoolsIO/comments/pjl4bh/what_is_your_opinion_of_grapheneos_conforming_to/
There are a few malicious actors and proponents of this community that attack everyone like an unorganized group, sometimes with sockpuppets and sometimes with their known accounts when they want to come off as self proclaimed experts.
A lot of evidence I collected personally via my own interactions with madaidan, cn3m and the likes: https://lemmy.ml/post/73800/comment/66676
Evidence of GrapheneOS proponents practicing censorship on Lemmy on my comment on c/GrapheneOS, one day after they became moderator (FYI this was my only comment on that sublemmy): https://lemmy.ml/pictrs/image/3hsM7Du9n6.jpg
They have also hijacked the Android, AOSP sublemmy communities by becoming defunct moderators.