Poking through the online fan communities, people seemed to resent:

• the desire to push a new spinoff show, Vaught Rising, starring a character that people didn’t really care about (Soldier Boy) who kept disappearing and coming back,
• visibly reduced production value,
• marketing that teased plot turns that never happened
• dragging the show past its expiration date by 2 additional seasons

I was always an arms-length viewer of the show, never really embracing it, acking it for the edgelord-chasing nihilism that it offered but never caring much about it. All that criticism sounds about right.

Respect to the on screen talent; they deserved better.