High-quality modders sometimes face harassment from users demanding updates or accusing them of stealing assets simply because the quality looks "too professional" to be amateur work. The Controversy: "Stolen" Assets vs. Creative Privacy
Because they aren't on the Steam Workshop, finding these mods requires a more direct approach: Arma 3 Private Mods
The private modding scene is a frequent point of contention within the Arma community: Arma 3 Private Mods