I just finished the game and overall, I cannot tell what people are so mad about. First off, this game is DARK! While I played I sometimes surprised at how dark Naughty Dog was willing to go on a PS4 game, but I like the direction that the "series" took The one critique I would have comes in the 2nd(?) half of the game where it takes a turn that was unwanted by me (no spoilers if you played the game you know what I'm talking about). But overall, I still really enjoyed the combat, and the detail to AI and graphics is incredible especially for me playing on a gen one PS4. Give this game a shot with an open mind and I think you will be surprised.
Afternote- this review came from someone who had no exposure to the leaks of the game, so take that as you will.