My word: trainwreck
Comparing AC:B manhunt to AC:3 manhunt is like comparing Michael Jordan to Detlef Schrempf.
I would post a word here, but all the accurate ones would require me to bypass the language filter.
If you would so kindly allow me 2 words, I would put: poorly implemented.
Assassin's Creed Wiki: Slate Vesper
There is no one word that can describe the monstrosity that is Assassin's Creed: Revelations -_-