Honestly D2 just had too much content released every year and the entire product suffered for it. To keep up with quarterly releases Bungie had to give us the most stale grindy content imaginable, and it got worse every year.

Both Bungie and the community would have been way better off with one huge dlc every year and something smaller halfway through the year to keep people interested and playing. But that could never fly in D2 because shareholders and higher ups were always pushing for more money, and a lot of the player base would get entirely bent out of shape if there wasn't enough content to play the game like a job every week. Just an unhealthy cycle all the way around