Even @TheAnonymouseJoker@lemmy.ml gives it backlash despite being a moderator of Lemmy's biggest privacy community. A quote here: "grapheneOS trolls are downvoting every single post and comment of mine, and committing vote manipulation on Lemmy. They are using 5-6 accounts." That was in response to downvotes on a comment posted in the c/WorldNews community, which is entirely unrelated to technology.
It seems to me that you might be confusing things: You say that people hate the OS but share a comment complaining about the community of users/fans, not about the OS.
I have never used GrapheneOS and cannot comment on the OS, but I have seen some users in different communities commenting that GrapheneOS is the only valid alternative OS and discrediting any other OS. It becomes tiring pretty fast.
May I recommend OSS Document Scanner + Syncthing? Both apps are FOSS and it looks to me like that they might be able to replace what Microsoft Lens does for you with the advantage that you are free of Microsoft software.