You're not. The Division fell off the face of the Earth so quickly because of several factors, and I'll begin with the most significant of reasons:
1. Once you've reached 30, there's literally nothing else to do but run the same 4 Challenge missions over and over again.
2. The material and weapon grind was unrewarding, a pain in the ass, and not worth the effort, leading to exploiting said Challenge missions and exceeding the 4 player lobby count – both of which I partook.
3. The braindead decisions that Massive have and are still making.
4. The Incursion is just... a joke.
5. Even when Destiny launched, brand spanking new in September of 2014 it had more endgame activities than The Division.
The game has a lot of potential that was squandered away, which now that I think about it isn't a massive (heh) surprise given it's an Ubisoft game. Oh, and the bugs and other nonsense. Oh, and if you exploited the Incursion you'll be punished for it, like, what the hell kind of a decision is that?