I think what it comes down to is that the devs somehow confused tedium with challenge. The entire overarching theme of NOT giving players things in order to coerce them into either repeating content ad nausem, or playing specific game modes, is just asinine.
Combine that with the utter and complete failure of the Darkzone to mix PVE and PVP, and the failure to step into the raiding scene. It's just....uhg. If the moment to moment shooting wasn't so good, this game would have bombed as hard as Anthem.
I REALLY hope that if they ever attempt a Division 3, they keep the movement, cover, and shooting, but cut away everything else and design from the ground up. Ditch the idiotic attempts at PVP. Stop trying to turn a small-squad looter into a raid progression guild-based game. Just focus on the PVE story, matchmaking, looting, and variations of those: Underground, Survival, Incursions.