Well you see, the complain is mainly because since he's no longer at Konami, they could easily made a few tweaks for Zangetsu mode, instead of the bare bones mode. Personally i played with him a little more than half the game and then i got bored. No trophies, no reason at all or motivation to play with him and took them 10 months to deliver it. They scrapped rogue mode with randomizer, another useless mode, again in my opinion.
Now, if any of the new content had some trophies, i'm sure most people would tried them and that they wouldn't complain that much. I know there are technical difficulties, but when people give you all the time you need to make something, i know that in the end you can find a solution and not walk the easy path.
He promised that it would be his biggest game, something that didn't happened, the main game is to short compared to previous titles, like SotN or PoR. Now i'm not complaining here, before someone starts shooting fire at me, i'm just stating some facts here, as to why most people feel hate about this game.